ATTACHMENT C
United States
Environmental Protection
Agency
Office of Air Quality
Planning and Standards
Research Triangle Park, NC 27711
EPA-454/R-97-005
June 1997
REPORTING GUIDANCE FOR
1996 PERIODIC EMISSIONS INVENTORIES AND
NATIONAL EMISSION TRENDS (NET) INVENTORIES
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REPORTING GUIDANCE FOR 1996 PERIODIC EMISSION INVENTORIES
AND NATIONAL EMISSION TRENDS (NET) INVENTORIES
FINAL
Issued By:
Emission Factor and Inventory Group
Emissions Monitoring and Analysis Division
Office Of Air Quality Planning and Standards
U.S. Environmental Protection Agency
Research Triangle Park, North Carolina 27711
June 30, 1997
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ACKNOWLEDGEMENT
To assist in the development and preparation of this guidance document, the
U.S. Environmental Protection Agency's (EPA's) Emission Factor and Inventory Group (EFIG)
formed a Work Group consisting of state air quality agency and EPA Regional Office
representatives. The Work Group consisted of the following individuals: Tom Ballou, Virginia
Department of Environmental Quality; Bill Gill, Texas Natural Resource Conservation
Commission; Bill Kuykendal, U.S. EPA/EFIG; Bob McConnell, U.S. EPA/Region 1 Office;
Terry Newell, U.S. EPA/Office of Mobile Services; Herb Sherrow, U.S. EPA/Region 6 Office;
Dale Shimp, California Air Resources Board and other members of CARB's Stationary Source
Emission Inventory Branch; and Jim Southerland, North Carolina Department of Environment,
Health, and Natural Resources.
This Work Group participated in the review and revision of detailed outlines for the
guidance document, and provided review comments on the draft document. In addition to the
formal Work Group, other participants in the development of this document are: Damian Ellis
and Raymond Forde from EPA Region 2, Rose Quinto from EPA Region 3, Joe LeVasseur from
HPA Region 4, Charles Hatten, Bill Jones, and Elizabeth Nguyen from EPA Region 5, Aaron
Worstcll from EPA Region 7, Sarah Laumann from EPA Region 8, and Bill Puckett from EPA
Region 10. .
EPA/EFIG wishes to acknowledge the participation of all these individuals in the
guidance document preparation process. Through their combined efforts, a useful and effective
plan was generated that will help serve as a guide and roadmap to states and EPA regional offices
in the implementation of Clean Air Act 1996 emission inventory requirements, and in EPA's
continued development of a national emissions inventory. Everyone's efforts and inputs are
greatly appreciated.
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TABLE OF CONTENTS
^i^»-^
Chapter
1.0 Purpose of Guidance l~l
1« T^-*-!,,-»**»» _._----- * .... " *« 1"*A
. 1 introduction
1.2 Purpose of the Guidance ........ .
1.3 State's Role in the NET Inventory ................................... -°
1.3.1 Review of the NET Data .................................... 1'8
.1.3.2 Using NET Data in 1996 PEI Development .................... Ml
1.4 Impact of Proposed Changes to CAA Section 110 Provisions ............ 1-12
1.5 Reporting Schedule ...................................... ...... l~15
1.6 Organization of Guidance Report ............................. :_ ---- *'16
2.0 Data Reporting Requirements
3.0
2.1 Purpose [[[ -
2.2 NET Data Review Process and Priorities ............................. 2~2
2.3 Detailed Reporting Requirements ................................... 2'2
2.3.1 Point Source Data Elements .................................. 2"3
2.3.2 Area Source Data Elements .................................. 2'7
2.3.3' Onroad Mobile Source Data Elements ......................... 2-10
2.3.4 Non-road Mobile Source Data Elements ..... .................. 2-12
2.3.5 Biogenic and Geogenic Source Data Elements .................. 2-14
2 4 . Summary Data Reporting ........................................ 2'14
5 1
Electronic Data. Reporting Requirements ........ .............................. -*"1
j 1
3.1 Overview [[[ ->~1
3.2 Electronic Reporting Options ...................................... 3'2
3.2.1 EIIP Data Model/EDI Format ................................. 3'3
3.2.2 EIIP Data Model/NET Database Format . . ....................... 3-6
3.2.3 AIRS Format .............................................. 3'7
3.2.4 Other Electronic Reporting Formats ............................ 3'7
4.0 Documentation And Data Review
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TABLE OF CONTENTS (CONTINUED)
Chapter
Page
5.0 Procedural Guidance and the Role of the Emission Inventory Improvement
Program (EUP)
5-1
5.1
5.2
5.3
5.4
5.5
5.6
Point Sources 5-2
Area Sources 5-3
Mobile Sources 5-4
Biogenic Sources 5-5
Quality Assurance 5-5
Data Management 5-7
6.0 References '. 6-1
Appendix A Data Dictionary for Reporting Requirements Data Elements
IV
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TABLES AND FIGURES
Tables Page
1-1. Comparison of Primary Components in the 1996 PEIs and NET Inventories 1-7
2-1. Detailed Reporting Requirements for Point Sources for-PEI and NET Inventories ... 2-4
2-2. Detailed Reporting Requirements for Area Sources for PEI and NET Inventories 2-8
2-3. Detailed Reporting Requirements for Onroad Mobile Sources for PEI and
NET Inventories 2-11
2-4. Detailed Reporting Requirements for Non-road Mobile Sources for PEI and NET
Inventories 2-13
2-5. Detailed Reporting Requirements for Biogenic and Geogenic Sources for PEI and
NET Inventories 2-15
5-1. Point Sources Volume Chapters 5-3
5-2. Area Sources Volume Chapters 5-4
5-3. Mobile Sources Volume Chapters 5-5
5-4. Quality Assurance Volume Chapters 5-6
Figures
3-1. EIIP Data Transfer by EDI X12 3-5
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1.0 PURPOSE OF GUIDANCE
1.1 INTRODUCTION
Several regulatory provisions are contained in the Clean Air Act (CAA) that direct the
U.S. Environmental Protection Agency (EPA) to collect and maintain emissions inventory data.
Inventory data are collected from the states for a number of different purposes. Most are related
to some aspect of a state's State Implementation Plan (SIP) for achieving and maintaining
compliance with National Ambient Air Quality Standards (NAAQS). This guidance document is
designed to communicate EPA requirements for the reporting of emissions inventory information
for two such inventory programs - the 1996 Periodic Emission Inventories (PEIs) and the
National Emissions Trends (NET) inventory. After a brief description of the PEI and NET
inventory programs below, the purposes and objectives of this reporting guidance are detailed
(Section 1.2), EPA expectations of the states on reporting are identified (Section 1.3), overlaps
between the PEI and NET inventories are discussed (Section 1.2), and the impacts of proposed
upcoming changes to air quality management in the SIP process and the role of inventories are
summarized (Section 1.4). Schedule considerations are summarized in Section 1.5. Lastly, the
organization of the remainder of the guidance document is explained (Section 1.6).
The Clean Air Act [under Section 187(a)] requires that state and local agencies develop
periodic emission inventories for ozone nonattainment areas classified as marginal and above.
The Clean Air Act [under Section 187(a)] requires that state and local agencies develop these
inventories for carbon monoxide (CO) nonattainment areas classified as moderate or serious.
The purposes for which PEIs may be used include monitoring the 15 percent rate-of-progress
plans, determining whether emission caps are being maintained for attainment areas with
maintenance plans that call for PEIs, and to track emissions relative to future reasonable further
progress requirements. PEIs are to be submitted to the EPA every three years. The
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1993 inventory was submitted in 1995. The 1996 PEIs are to be submitted to the Agency no
later than November 15,1998.
Clean Air Act Sections 110(a) and 172(c) also give the Agency authority to require
inventory data from the states for SIP development purposes. Section 172(c)(3) provides EPA
<
with discretionary authority to require emissions data as deemed necessary for SIP development
to meet the NAAQS. Under Section 110(a)(2)(F)(ii) of the CAA, states are required to provide
criteria pollutant emissions information under general SIP requirements. Much of the inventory
information collected through these means has been compiled by EPA into a national repository
database known as the National Emissions Trends (NET) system. This inventory will compile
data to track the trends of air emissions, deposition, quality and visibility impairment, and to
ensure the comparability of air quality data collected in different states and obtained from
different nations.
The NET inventory contains the U.S. EPA's latest estimates of national emissions for
criteria pollutants: carbon monoxide (CO), nitrogen oxides (NOX), volatile organic compounds
(VOC), sulfur dioxide (SO2), particulate matter less than 10 microns (PM-10), and total PM.
Non-criteria pollutants included in the inventory are hazardous air pollutants (HAPs), particulate
matter less than 2.5 microns (PM-2.5) and ammonia. Estimates are contained in the inventory
for the years 1900 to 1996, with increasing levels of detail in the more recent years. For the
purposes of the inventory, EPA makes annual emission estimates based on statistical information
about each emitting source category, emission factors, and control equipment efficiencies. The
estimates are made for over 450 individual source categories that include all major sources of
anthropogenic emissions. The 1996 NET inventory will include state-submitted inventory data
generated for the Ozone Transport Assessment Group (OTAG) and Grand Canyon Visibility
Transport Commissions (GCVTC) and other inventory services. The NET inventory, however,
docs not necessarily include state data for any particular source or pollutant. The 14 major
source types for which emissions are presented are: fuel combustion-electric utilities, fuel
combustion-industrial, fuel combustion-other, chemical and allied products manufacturing,
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metals processing, petroleum and related industries, other industrial processes, solvent
utilization, storage and transport, waste disposal and recycling, on-road vehicles, non-road
sources, natural sources, and a miscellaneous category (e.g., agriculture, wildfires, cooling
towers, fugitive dust, accidental releases, etc.).
To support the 1996 emission inventory efforts, the EFIG has established the 1996
Emission Inventory Home Page. The home page serves as a central information source for the
preparation of the 1996 emission inventories and the submission of the data to EPA. It is the
source of the most current information and should be consulted for updated information. Major
headings on the home page are:
Background
Guidance Documents for Preparation of the 1996 Emission Inventory
Data Submission
Frequently Asked Questions (FAQ)
Emission Trends Data
Regional Office Emission Inventory Contacts
Emission Factor and Inventory Group Contacts (EFIG)
What's New?
Where To Ask For Help
- Public Forum
The Address for the home page is : http//www.epa.gov/oar/oaqps/efig/ei/. Additional
information is available through the Info CHIEF Help Desk at: (919) 541-5285.
To recap the planned EPA approach regarding NET inventory data (contained in the
January 1997 guidance document Action Plan for Submittal of 1996 Periodic Emission
Inventories and Review of NET Inventory Data2'). EPA intends to provide statewide 1996
emissions inventory data on a county level basis to every state in the country. These data will be
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provided such that they are available at the same time states will be in the.process of PEI
development Receiving all states' review and feedback on the NET data is extremely important
to the EPA. The NET inventory data can be very useful and beneficial to states for several
purposes including: aiding in the compilation of the 1996 PEI, providing the state with a
comprehensive (including better pollutant coverage) emissions inventory, providing a starting
point for a statewide toxics inventory, providing data for more expanded air quality dispersion
modeling analyses, and helping in characterizing boundary conditions for nonattainment areas.
Obtaining state review and comments on the NET data is a major goal of this process.
1.2 PURPOSE OF THE GUIDANCE
The EPA is issuing this guidance document to communicate requirements and enhance
states' understanding of the types of emissions inventory information they should be reporting to
EPA in connection with the 1996 PEIs and their review of 1996 NET inventory data. The
document specifically presents the individual data elements that EPA wants to have reported in
each state's 1996 PEI for point, area, mobile (onroad and non-road), and biogenic source types.
In addition to identifying these elements, the guidance also discusses the options available to a
state for electronically providing the necessary inventory data to EPA. As has been recently
communicated to states in other guidance2, EPA will not accept paper copy-only submittals of
1990 PEI data.
EPA Regional Offices will have the primary responsibility for inventory review and
approval. State and local agencies should contact their Regional Office (RO) early in the
inventory process to identify any additional reporting requirements.
The EPA is implementing changes in the CAA Section 110 regulation on SIP procedures
and requirements (discussed in greater detail in Section 1.4 of this document). One aspect of
these changes will be to increase the significance of the central national database that EPA is
building in the form of the NET inventory for future national air quality management policy.
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Many of the general reporting requirements associated with PEI data and NET inventory data are
the same due to the large amount of overlap between the two data sets. Because of these
reporting changes, the increased importance of the NET inventory review by the states, and the
similarities between the two inventories, reporting requirements for the PEI and NET inventory
submissions are being provided together in this document However, more information will be
needed for the statewide NET inventory data sets because of the uses these data will have in
regional air quality modeling and attainment planning (see Section 1.4).
To be effective and useful, inventory data must be reported in a manner that allows an
organization, other than the preparing agency, to perform thorough quality review of the data and
to apply the data to address various air quality management needs (modeling, control strategy
development, emissions trading, etc.). The data must be understood and used by EPA, other
states, other agencies, and the public. As EPA moves more towards a regional focus in
addressing air quality issues, there will be more pressures on states to share their inventory data
with other groups. States are encouraged to plan, document, and store their inventory
information with this in mind and in a manner that allows for efficient reporting, sharing, and
The goal of this guidance is to identify the key reporting data elements and present them
in a manner that is clear and streamlined. By doing this, EPA will be able to achieve better
national inventory consistency and completeness, to support regional air quality planning and
attainment This guidance material will also assist the EPA Regional Offices as they assume
greater responsibilities for inventory review and approval. The decentralization of the inventory
review process means that minimum acceptable reporting standards should be followed.
Lastly, one of the goals of this reporting guidance is to highlight the overlap and
similarities of the reporting requirements applicable to the 1996 PEIs and statewide NET
inventory data. States should make every effort to take full advantage of the ability to coordinate
both the inventory development and reporting aspects of the PEI and NET inventories, and other
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emissions reporting programs such as emission statements and annual statewide reports for major
sources. The coordination of these efforts will reduce the overall reporting burden and save
resources.
The primary components of the PEI and NET inventories are listed for comparative
purposes in Table 1-1. The most significant differences between the two are the number of
pollutants included (and consequently the number of source categories potentially included) and
the number of distinct point sources addressed due to differences hi point source thresholds. The
NET inventories have many more pollutants hi them beyond the PEI nonattainmeht pollutants
(VOC, NOX, and CO); therefore, additional source categories will be present that are not part of
the PEI development and reporting effort. The NET inventory point source thresholds are
determined by the emissions data source used, and will vary depending on the point source
thresholds of the data source. If a state collects data for all facilities emitting more than 5 tons of
VOC per year, and that data has been incorporated into the NET inventory, then the threshold for
VOC in that state will be 5 tons per year. The NET documentation can provide information
about what source of information were used for point source emissions, and users can then
determine the thresholds for NET inventory point sources in their state.
Another difference between the NET and PEI inventories is the application of rule
effectiveness (RE) for point and RE and rule penetration (RP) for area sources. In previous
inventory efforts, RE and RP have not been uniformly applied. RE and RP are required for
inventories for non-attainment areas and the PEI. RE and RP are not included in the NET
calculations, except for some utility point sources. Regional offices will take primary
responsibility to define policy for using RE and RP. States should contact their RO for guidance
on this issue early in the inventory process. More information about RE and RP policy is
available on the OAQPS emission inventory Web site, listed in Section 1.1 of this document.
For common pollutants and source categories between a PEI and an NET inventory, the
overlap between required core data elements will be extensive. The tables in Chapter 2 clearly
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TABLE 1-1. COMPARISON OF PRIMARY COMPONENTS IN THE 1996 PEIs AND
NET INVENTORIES
Geographic Coverage
Pollutants ...
Sources
Point Source Size
Thresholds
Spatial Resolution
Temporal Resolution
Inventory Year
Periodic Emission In vcdtories
Designated nonattainment (NA) areas
VOC.CO.NO,
Stationary Point Sources
Stationary Area Sources
Onroad Mobile Sources
Non-road Mobile Source
Biogenic Sources (Trees, agricultural crops,
soils)
Ozone NA Areas:
VOC> lOtpy
NO, > 100 tpy
CO > 100 tpy
CO NA Areas:
CO > 100 tpy
Source emitting > specified tpy characterized as
point sources
Source emitting < specified tpy are combined
and reported as area source category
Stationary Point Sources: estimates by
Lat/Long or UTM coordinates
Stationary Area Sources: county level
Onroad Mobile Sources: county level
' Non-Road Mobile Sources: county level
Biogenic Sources: county level
Annual and seasonal daily emissions
199"6
itatioM^tt^lba Tr^a$>lttvli&|j||
Statewide, entire US
VOC, CO, NO., SO2, PM-10, PM-2.5, HAPs,
Ammonia ..
Stationary Point Sources
Stationary Area Sources
Onroad Mobile Sources
Non-road Mobile Source
Biogenic Sources (reported separately in Fall 1997)
Geogenic Sources
Thresholds for all pollutants may vary from state to
state. See the discussion in the text .
Stationary Point Sources: estimates by
Lat/Long or UTM coordinates
Stationary Area Sources: county level
Onroad Mobile Sources: county level
Non-Road Mobile Sources: county level
Geogenic Sources: county level
Annual and seasonal daily emissions
1996
HAPs includes 37 pollutants EPA is focusing on in its National Toxics Inventory. The 37 are toluene, POM, benzene,
formaldehyde, xylenes, 1,3- butadiene, tetrachloroethylene, trichloroethylene, acetaldehyde, acrolein, methylene
chloride, hydrazine, glycol ethers, styrene, arsenic compounds, chloroform, nickel compounds, lead compounds,
manganese compounds, ethylene dichloride, bis(2-chloroethyl) ether, cadmium compounds, acrylonitrile, ethylene
oxide, vinyl chloride, chromium compounds, diphenyl methane diisocyanate, mercury compounds, 2,4-toluene
diisocyanate, antimony compounds, ethylene dibromide, acrylamide, beryllium compounds, phosgene, 2,3,7,8-TCDD,
2,3,7,8-TCDF, and coke oven emissions. In terms of POM data, states need to clearly identify how they define POM
and what species are included in the POM estimate.
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illustrate this. The most significant reporting aspects of the NET data are in the broader array of
pollutants and source categories covered.
13 STATE'S ROLE IN THE NET INVENTORY
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1.3.1 Review of the NET Data
Each state is being asked to review the NET data provided by the EPA and to augment
and improve the data in the NET with the state's inventory data prepared as part of the 1996 PEI
and other inventory efforts. EPA hopes that this review by the states will be a significant step
towards validating the accuracy of the NET inventory and increasing the pollutant and source
coverage contained in the NET system. The states are expected to gain data that may be used to
fill gaps currently existing in their inventories, enhancing the chances of getting a successful
1996 PEI process. The NET data are not being provided to relieve any state agency of its
obligations under the CAA to prepare and submit a 1996 PEI that represents their best estimate
of actual emissions for that year. The NET data are not to be simply sanctioned by a state as its
daia for the purposes of the 1996 PEI requirement and returned to EPA.
The EPA wants state and local agencies to review and compare the NET data to their
existing equivalent data (PEI or other state inventory) for the s'ame sources and pollutants. If the
state determines that its current information for 1996 is of higher quality (based on any number
of factors). EPA wants to obtain these data from the state so that the NET inventory can be
revised In these cases, the state should coordinate any exchange of inventory data for NET
updating purposes with the EPA's Emission Factor and Inventory Group (EPA/EFIG). If the
data are applicable to the 1996 PEI, they can be provided through the regular PEI information
transfer paths discussed in Chapter 3. Other (non-PEI) data can be supplied directly to
EPA/EFIG for NET inventory updating purposes. Similarly, if upon review the state determines
it has additional pollutant and/or sources data beyond that in the NET data set, EPA would like to
obtain these data as well. The goal is to obtain all state inventory data, for as many sources and
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pollutants, that the state has available. A state will make two data submissions under this
process: one data submissions of inprovements to the NET inventory, and the submission of the
PEI data. States must remember to update both data sets when inventory's data changes.
A state may decide to simply send a replacement data set based on their PEI to overwrite
all of the comparable NET data. This may or may not be accompanied by any review of the NET
data. This is also an acceptable response, and so long as the state's data are sent in a format
which can be transferred into the NET database (see Section 3.2).
The EPA also desires to have each state identify and provide additional data they may
have for their state in terms of increased pollutant and/or source coverage. For example, a state
may receive the NET data for VOC and NOX emissions and upon review find that the data are
the same as what the state has. The state also, however, may have developed data for the source
for PM-10, PM-2.5, and ammonia. As a part of the 1996 PEI process, EPA would like to obtain
the added data a state may possess for sources already in the NET system, and data for sources
not in the NET inventory. This need extends as well to other non-criteria data such as toxics and
PM-2.5.
In each case, the criteria data (VOC, NOX, CO, PM-10) are of top priority, but if possible,
EPA would "like to receive, through the NET distribution and review process, whatever data the
state has for other criteria pollutants (SO2) , toxics, and other pollutants including ammonia, and
PM-2.5. The rationale for this request is that if a state has information on VOC, NOX, and CO
emissions from a source, it should not be a significant additional burden to ask the state to report
the estimates available for all pollutant species. If a state has information that indicates the NET
data are missing entire sources, EPA would want to know this. It is EPA's goal that the NET
inventory contain data for all states, addressing all source categories, and quantifying as many
pollutants as possible (see pollutant list in Table 1-1).
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States should take this opportunity to identify source categories that are larger
contributors to their inventory and that had emissions estimated using advanced or more detailed
methods than those used for the NET data. Priorities in comparing NET and PEI data should be
defined based on the state's knowledge of the strengths of then- own inventory efforts. However,
some data in the NET for significant emission sources or source categories such as utilities, large
/
industrial facilities, and biogenics already have a reasonably high confidence level, and should
not need extensive review.
States should also review NET data for instances of double counting. When point source
data and area source emissions from a state has been drawn from two different data sources, then
potential double counting of emissions can occur when a process is inventoried as both point and
area sources.
A final priority for NET data review are those pollutants and source categories which
have the lowest confidence level attached to them: emissions of ammonia, solvent use sources,
area source emissions, fugitive dust emissions, and data gaps in supporting data. The NET
inventory supporting documentation and cover letter discuss these areas of special concern in
more detail. Information about the methods used to generate NET emission data can be found on
the NET Web site, listed in Section 1.1 of this report.
Statcs.nced to be fully aware that all emissions inventory data that are submitted to EPA
for PEls for the NET inventory will be made publicly available. Data could be placed on an FTP
site and made accessible through the Internet, placed on EPA electronic bulletin boards,
distributed through CD-ROM, or distributed in printed reports. States should, therefore, not
submit any confidential information to EPA as a part of this process because EPA will not have
any provisions for dealing with this information and treating it differently as confidential data.
Any PEI or NET information provided by states is subject to full public disclosure.
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1.3.2 Using NET Data in 1996 PEI Development
The NET data will be provided to a state agency for the whole state. It is hoped that in
addition to potentially being an aid for the nonattainment area PEI, it may be useful for gap
filling in attainment areas where the state may not have obtained sufficient inventory estimates.
For example, due to the differences in reporting, inventorying, and permitting requirements
between attainment and nonattainment areas, small industrial and small utility sources in
attainment areas may not have been that well addressed. The NET data may help fill in data for
such source types if the state agency feels the data are valid. This application could be very
useful in compiling the inventory data needed for the Regional Air Management Partnerships
(RAMPs) being formed as a function of changes to the SIP program (see Section 1.4). State
agency review of me data will be required to make these determinations.
The point should be clearly understood and appreciated that EPA views state or local
agency-derived data are preferable and likely of higher quality than NET inventory data. Where
a state or local agency has emissions estimate data for its area(s) (attainment or nonattainment),
these data would supersede comparable data EPA may have in its NET database for the same
arcn(s). It is EPA's intent that the process of making the NET data available is a mutually
beneficial undertaking. It is hoped that by having the NET data, the state/local agency can be
more timely with data submittals and can save some resources in the required process to generate
a 1996 PEL
As an example, for some states, a reasonable use of NET data in a PEI would be to use
some or all of the EPA-generated estimates for biogenics, onroad mobile and non-road mobile
sources, rather than the state re-generating these estimates. However, unlimited verbatim use of
NET data to fulfill 1996 PEI reporting requirements for large point sources and significant area
source categories is not acceptable. A clear benefit of using NET data for some of the inventory
needs (where appropriate) would be that additional state resources would be made available for
more rigorous treatment of point and area sources. For instance, use of the point source data
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could be a starting point for a more in-depth point source inventory conducted by the state in an
attainment area.
14 IMPACT OF PROPOSED CHANGES TO CAA SECTION 110 PROVISIONS
.'
Under the provisions of the Federal Advisory Committee Act, the EPA has formed an
advisory committee under the Clean Air Act Advisory Committee to obtain advice and
recommendations on integrated approaches for implementing revised NAAQS for ozone and
paniculate matter, as well as a new regional haze program. This group, known as the
Subcommittee for Development of Ozone, Particulate Matter, and Regional Haze
Implementation Programs, contains 58 members and functions with five work groups. One of
these groups, the National and Regional Strategies Group (NRSG), is responsible for the
development of broad regional and/or national strategies for addressing air pollutant transport
issues. The reader is reminded that the changes to the CAA being discussed here are not final at
the time of this writing, and the final version of the changes may be somewhat different from
those discussed here.
More detailed information on the Clean Air Act Advisory Committee and the NRSG and
these groups' programs can be found on the Technology Transfer Network (TTN) Internet Web
Sue for FAC'A at http://134.67.104.12/html/o3pntfh/faca.htmtfFA01 . The address for the more
i
general TTN Web Site is http://ttnwww.rtpnc.epa.gov/ .
The efforts of this FACA group have produced recommendations to EPA that will result
in significant changes in how air quality management for NAAQS is planned and achieved in the
United States. The proposed changes have been developed to coincide with the promulgation of
revised NAAQS for ozone and PM in the summer of 1997. The NRSG has made
recommendations that EPA is implementing that will involve changing some of the current CAA
Section 110 regulations on SIP procedures and requirements. The changes will alter the need for
future PEIs and greatly increase the significance of the central national inventory database EPA
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is trying to build in the form of the NET inventory. The core of the SIP process changes revolves
around the adoption of a regional instead of localized (i.e., individual nonattainment area)
strategy to solve NAAQS nonattainment problems. The model for the recommendations of the
NRSG has been the work of the Ozone Transport Assessment Group (OTAG).
The initial changes to CAA Section 110 will take place in what is known as the Phase I
Implementation. In Phase I, the entire country (exclusive of Alaska and Hawaii) will be divided
into Regional Air Quality Management Partnerships (RAMPs). RAMPs will define the
fundamental spatial areas in which air quality management will be carried out. The formation of
RAMPs will be undertaken by combining technical and political considerations hi the
identification of areas which have common air quality characteristics and share common air
quality concerns. Technical considerations may include anticipated air quality and haze
problems, meteorology, and emissions density. Political considerations may include the existing
institutional structures [e.g., groups such as the Ozone Transport Commission (OTC), Lake
Michigan Air Directors Consortium (LADCO), etc.] and the desires of individual states and
Indian tribes.
All states (except Alaska and Hawaii) will be placed into a RAMP. If a state requests, it
can be assigned to more than one RAMP; however, no state will be required to be in more than
one RAMP. The placement of a state or tribe in a RAMP does not require that state to participate
in the activities of the RAMP, However, the RAMP will include all of the area within the
RAMP boundaries in the air quality management work which it undertakes, and it may make
recommendations and establish policies and procedures which affect the nonparticipating states
and tribes. It is anticipated that 3 to 10 RAMPs will eventually be created. More information
and current developments on RAMP creation can be found at the FACA Web Site referenced
above.
As a part of the Phase I Implementation, states with existing NAAQS nonattainment
areas will be expected to compile and submit to EPA a 1996 PEL This inventory will serve as a
7W7-91-03\RI'T(H)m.l:IN
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component to a larger inventory each state within a RAMP will be expected to have. New or re-
designated nonattainment areas (based on air quality data) will fall under the full provisions of
the Phase I Implementation and the changes that are being implemented in CAA Section 110
affecting the SIP program. Once the RAMPs are established, several activities will be initiated
that affect .and influence the creation of emission inventories.
At their onset, the individual RAMPs will determine what will be known as Areas of
Violation (AOVs) of the NAAQS within their RAMP. These determinations will be made using
ambient air quality monitoring data. Once the AOVs within a RAMP are specified, there will be
a need to define'the Areas of Influence (AOIs) that are contributing and causing the violations.
In addition, AOIs may also be identified for regional haze issues and planning. The EPA, in
conjunction with the Science and Technical Support Work Group, will issue technical guidance
that the RAMPs will use to make AOI determinations. It is possible that a RAMP could identify
areas outside of its boundaries as possible AOIs to their AOVs. A more thorough treatment of
the issues surrounding AOV and AOI determination is available at the FACA Web Site.
Emission inventory data will be used in conjunction with air quality models and other
information to determine the preliminary AOIs for a RAMP. The EPA intends to use the data
from the NET inventory database, compiled after initial review by the states, as the inventory
data to be used in the air quality models used for the preliminary AOI analyses. The EPA plans
to maintain the NET inventory as the central emissions data repository for air quality
assessments that the RAMPs will have to perform to determine their appropriate regional
management strategies. Having a central system of this type for all RAMPs will facilitate data
sharing between RAMPs and provide for information of more consistent quality.
With the creation of RAMPs and the use of statewide inventory data for modeling and
preliminary AOI determinations, thorough state review and improvement of the NET inventories
is crucial. The inventory data and corrections to the NET inventory that each state is being asked
to provide to EPA by July 15, 1998 will be a key component to the Phase I Implementation
7997.Q!-0.1Mtl>r<;UII>l:IN 1-14 FINAL
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process as envisioned by EPA and the FACA subcommittees. The final NET data set that EPA
will produce for each state hi 1998, will be provided directly to the appropriate RAMP for use in
RAMP air quality management activities. The inventory reporting requirements presented hi this
guidance document reflect this intended use of the inventories. For example, stack emission
parameter data (stack height, stack diameter, temperature, etc.) are specified for point sources to
facilitate modeling.
In the second phase of implementation, projections of the base year inventories will also
be used by the RAMPs to estimate future year ah- quality conditions using modeling. The
projected concentrations will be used to formulate strategies for the RAMP and determine the
necessary emission control options to meet the NAAQS by the required attainment .date. The
control strategies and plans will be compiled into a document known as a Regionally Integrated
Plan (RIP). All of these intended uses of the NET inventory data serve to increase the
importance and urgency that states should place on performing a detailed review of the data for
their areas. The information states provide back to EPA on the NET data will form the starting
point for RAMP air quality evaluations.
1.5 REPORTING SCHEDULE
Emission inventory information required from states for the 1996 PEI and requested in
regards to the NET inventory, are scheduled to be reported to the EPA by July 15,1998. EPA
will review all data and provide comments back to the states by October 15, 1998. All 1996 base
year inventory information should be finalized by the states by January 15, 1999.
The July, 1998 submittal date would include having all information available
electronically, in one of the data transfer formats presented in Chapter 3 of this document. As a
part of meeting the July 15, 1998 date for the total inventory, state and local agencies are
encouraged to submit their inventories by component (e.g., point source data, area source data,
etc.) prior to July 15th if possible. For example, point source data may be submitted in April,
7W7-';i-().1\KI'T(HJID.FIN Irl5 FINAL
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area data in May, and mobile source data by June. This would leave some time before July 15th
to finish up any missing information and folly quality assure the data. Early submittal is
certainly not a requirement; however, EPA is very willing to receive submittals of completed
portions of a state's inventory early and begin the review process. Early submittals of inventory
components are encouraged for both the PEI and the state review/response to the NET inventory.
1.6 ORGANIZATION OF GUIDANCE REPORT
The remainder ofthis guidance document is structured as follows. Chapter. 2 contains a
presentation of the specific data elements for all source types that EPA desires to have reported
as a part of the states' 1996 PEI submittals. These reporting requirements represent.the data that
EPA requests be available in electronic format, as well as any paper copy materials a state may
provide. Reporting needs are also specified for the data EPA would like states to provide to
support the NET inventory process. Chapter 3 provides an overview of the primary methods
EPA would like states to use to electronically report their inventory information. Chapter 4
provides the reader a general summary of the minimum expectations EPA has for the
documentation of all inventory data submittals. Chapter 5 discusses the preferred source of
uu emory procedural guidance. Chapter 6 contains a reference list of materials cited in this
guidance
7'W7.<)|.0.«UPTGUID,F1N
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2.0 DATA REPORTING REQUIREMENTS
2.1 PURPOSE
Data reporting is an essential part of the inventory process'. A consistent reporting style
allows for the data to be used effectively by the state in the future, shared with other states,
transferred efficiently to the EPA, and makes it easily comparable with, and added to, data that
are in the NET. It is for this reason that data reporting requirements are defined. Data that are
missing the recommended elements, that are not compiled in a manner that can be compared to
other state's data or that can be compared to the data in the NET, may not be able to be used by a
RAMP for air quality analysis. The value of data consistency within a RAMP is explained in
Section 1.4. NET data will be used for missing data or inventory data that could not be loaded
into the NET. This chapter will present the specific data elements EPA would like to have
provided for both the 1996 PEI and the NET data updates.
Detailed source data are the data elements applicable to a specific source category,
fac 11 n\. emission point, or unit process. Once they are compiled into a national database,
detailed source data are used to perform the analyses needed to set ambient air quality standards,
lor air modeling efforts, to track progress in meeting CAA requirements, and to answer questions
from slate and local agencies and the general public. Summary data for inventories compile the
detailed data into a report that can be used to compare estimated emission levels of pollutants
between categories and between inventory areas. This chapter will define both detailed and
summary' reporting requirements as developed by EPA.
t
This chapter contains a discussion of NET data review by states (Section 2.2) and a
presentation of the specific data elements for all source types that EPA desires to have reported
as a part of the states' 1996 PEI submittals and as additions to the NET inventory. Detailed
reporting requirements for the PEI and the NET data are discussed in Section 2.3 by source type
7997-9 l-03\KPTGU!D.i:IN 2-1 FINAL
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(point, area, onroad mobile, non-road mobile, and biogenic sources). Summary data reporting
requirements are discussed in Section 2.4.
2.2 NET DATA REVIEW PROCESS AND PRIORITIES
B\
The EPA plans to provide all state and local agencies with NET system inventory data for
their areas on a county level basis. In cases where the state/local agency identifies mistakes or
problems with the NET data, EPA would like to have these findings communicated to them as a
part of the 1996 PEI process. EPA wants to know and understand when the state/local agency
believes its data are more accurate, more complete, or more representative of emissions as
compared to the NET information. EPA prefers to have the state/local agencies conduct a full
review of all the NET inventory information; however, the EPA realizes this may not be feasible
for every state. Each state and their RO will have to define priorities for review of the NET data.
See section 1.3.1 of this document for a discussion of review priorities.
2.3 DETAILED REPORTING REQUIREMENTS
i
Detailed reporting requires the specification of data elements applicable to a source
category, facility, emission point, or unit process. These are the data elements required to
calculate the emission estimate and adequately characterize the source, and those that are needed
in order to use that estimate in an air quality model.
Differences and similarities between the PEIs and NET inventory have been reviewed in
Chapter 1 and Table 1-1 of this guidance document. The most significant differences are the
NET inventory's coverage of an entire state, in comparison with only nonattainment areas
covered by PEIs, and the pollutants reported in the NET inventory that are not reported in a PEI.
Thresholds defining point sources of VOC and CO may also be defined differently in the two
inventories. PEIs will report as point sources facilities emitting greater than 10 tons per year of
VOC and 100 tons per year of CO. The NET inventory point source thresholds are variable, anil
7
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are defined by the data source used to compile a particular point source emission estimate. For
instance, emission estimates for State A may have been drawn from a database of sources
emitting over 1,000 tons per year. Emission estimates for State B may have come from that
state's 1993 SIP inventory, where aE sources emitting over 5 tons per year were inventoried as
point sources. When states have inventoried the emissions for smaller emitting point sources,
\
they should also report those emissions in the NET inventory...
To better understand, quality assure, and electronically store the estimates provided, both
emissions and several supporting data elements are requested for each primary source grouping.
The 1996 PEI submittal should contain complete (i.e., include emissions contributions from all
sources) emission estimates for all of the major source groupings: point, area, onroad mobile,
non-road mobile, and biogenic; however, the supporting data behind the estimates that-are
submitted can vary based on the data priorities and the available resources of the compiling
agency. In simplest terms, basic estimate and supporting data reporting should be focused on the
highest priority emitters.
Detailed reporting requirements for point, area, mobile, and biogenic source emissions
will vary by source type, based on the data elements needed to calculate the emissions for a
source and pollutant, the data needed to adjust the emission estimate to a seasonal or daily basis,
and the data elements needed for air modeling purposes. A data element is a piece of
information used to characterize some aspect of a source category's emissions, such as the
pollutant, the plant street address, or operation hours per day. Tables 2-1 through 2-5 list the data
elements required for each inventory source for both the PEI and the NET inventory. Appendix
A contains a data glossary for the data elements listed in the tables.
2.3.1 Point Source Data Elements
Inventory reporting requirements for point sources are shown in Table 2-1 for PEI and
NET purposes. Due to the larger number of emission points and their generally increased
7997-91-03\RPTGUin.nN 2-3 FINAL
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TABLE 2-1. DETAILED REPORTING REQUIREMENTS FOR POINT SOURCES
FOR PEI AND NET INVENTORIES
w M*£$ffjff?£**? - H^%S.%I;':S'^^^^K^S^
Emission Levels
Pollutants Addressed
Start Date (inventory year)
Start time (hour)
State FIPS
County FEPS
SIC code
Federal ID Code (plant)
! Federal ID Code (point)
Process ID Code
i.
Site Name
, Physical address
;scc
Pollutant Code
Emission Factor
Heat content
Sulfur Content
Ash Content
Activity/Throughput (annual)
'^°?£j5^#₯'5&>vv> ASjSSv^^«SSft^^.'4ssSS^sS§!8^;^
VOC>10tpy
NOx > 100 tpy
CO>100tpy
VOC,NO,,CO
NAb
VOC,NO«CO,PM-10,
PM-2.5, SOj, HAPsc,
Ammonia
I
1
1
1
,
7«J07-9l-0.1\RI'TGllll) I:I
. 2-4
FINAL
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TABLE 2-1. DETAILED REPORTING REQUIREMENTS FOR POINT SOURCES
FOR PEI AND NET INVENTORIES (CONTINUED)
Winter Throughput (%)
Spring Throughput (%)
Summer Throughput (%)
Fall Throughput (%)
Hr/day in operations
Day/wk in operations
Wk/yr in operations
Boiler Design Capacity
Maximum Design Rate
Maximum Nameplate Capacity
Primary Control Efficiency
Secondary Control Efficiency
Control Device Type
Rule Effectiveness %
Annual Emissions
Work Weekday Emissions
Federal ID Code (Stack Number)
X coordinate (latitude)
Y coordinate (longitude)
Stack Height
Stack Diameter
V
^Jv-^SS^yifc^ *. ~'s'%^^;.'xv'v'v %$^x^5&^
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TABLE 2-1. DETAILED REPORTING REQUIREMENTS FOR POINT SOURCES
FOR PEI AND NET INVENTORIES (CONTINUED)
Exit Gas Flow Rate
Exit Gas Velocity
Exit Gas Temperature
All data element terms are defined in Appendix A.
b Thresholds for all pollutants may vary from state to state in the NET inventory. See the discussion in Section
1.2.
c HAPs includes 37 pollutants EPA is focusing on in its National Toxics Inventory. The 37 are toluene, POM,
benzene, formaldehyde, xylenes, 1,3- butadiene, tetrachloroethylene, trichloroethylene, acetaldehyde,*
acrolcin, methylene chloride, hydrazine, glycol ethers, styrene, arsenic compounds, chloroform, nickel
compounds, lead compounds, manganese compounds, ethylene dichloride, bis(2-chloroethyl) ether, cadmium
compounds, acrylonitrile, ethylene oxide, vinyl chloride, chromium compounds, diphenyl methane
diisocyanate, mercury compounds, 2,4-toluene diisocyanate, antimony compounds, ethylene dibromide,
acrylamide, beryllium compounds, phosgene, 2,3,7,8-TCDD, 2,3,7,8-TCDF, and coke oven emissions. In
terms of POM data, states need to clearly identify how they define POM and what species are included in the
POM estimate.
2-6
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complexity, more information is requested for point sources than any of the other source types.
The data reporting request centers around providing information to identify the physical source
(name, location, identification codes, etc.), data to describe the individual emission points and
their operation (SCC, pollutants emitted, stack identification, activity data, schedules), emission
estimates (annual, and average seasonal), and information required for modeling. The
* *
requirements specified in Table 2-1 are consistent with the structure of the EIIP Data Model.
The EPA recognizes that not all supporting data elements can be reported,, due to confidentiality
laws in a state. Information on some other data elements, such as boiler design capacity, or the
heat sulfur or ash content of fuel, may not be applicable, and some data elements may not be
available.
An important distinction between the PEI and NET inventory point source information is
the potential difference in the emission thresholds defining point sources. It is quite possible that
states may have point source data for sources that are not reported as point sources in the NET
inventory. These sources should be added to the NET inventory as point sources. When a
process included in a point source category also takes place as an area source category, double
counting may occur. States should check, and if necessary, update emissions for those area
sources when adding point source records.
2.3.2 Area Source Data Elements
Table 2-2 lists the reporting requirements for area source categories for PEI and NET
purposes. Similar to point sources, these reports should present data that identifies and describes
the source category and its location (e.g., category name, county code), emission factors, the
activity and operational schedule of the category (e.g., total annual activity,
daily/weekly/seasonal operating schedules), and the applicability of controls. Emission estimates
are needed on an annual and average seasonal daily basis. Information on controls and their
associated rule effectiveness and rule penetration factors is needed if these factors were applied
to determine the area source estimate.
7')y7-<)i-o.v,Ri'ix;uiDi:iN ' . 2-7 FINAL
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TABLE 2-2. DETAILED REPORTING REQUIREMENTS FOR AREA SOURCES FOR
PEI AND NET INVENTORIES
Emission Levels
!
Pollutants Addressed
Start Date (inventory year)
State FEPS l
County FEPS
Source Category Code
Pollutant Code
Emission Factor
Activity/Throughput (annual)
Winter Throughput (%)
Spring Throughput (%)
! Summer Throughput (%)
Fall Throughput (%)
Hr/day in operations
Day/wk in operations
Wk/yr in operations
Control Efficiency (%)
Rule Effectiveness (%)
Rule Penetration (%)
Annual Emissions
VOC^lOtpy
NOx<100tpy
CO<100tpy
VOC,NOX,CO
d
d
d
NAb
VQC,NO«qO,PM-IO, .-
PM-2.5, SO2, HAPs",
Ammonia
^
7'J07.9I-03\R1>TOUID.I:1N
2-8
FINAL
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TABLE 2-2. DETAILED REPORTING REQUIREMENTS FOR AREA SOURCES FOR
PEI AND NET INVENTORIES (CONTINUED)
Summer/winter work weekday
emissions
a All data element terms arc defined in Appendix A.
b Thresholds for all pollutants may vary from state to state in the NET inventory. See the discussion in
Section 1.2.
c HAPs includes 37 pollutants EPA is focusing on in its National Toxics Inventory. The 37 are toluene,
POM, benzene, formaldehyde, xylenes, 1,3- butadiene, tetrachloroethylene, trichloroethylene,
acetaldehyde, acrolein, methylcne chloride, hydrazine, glycol ethers, styrene, arsenic compounds,
chloroform, nickel compounds, lead compounds, manganese compounds, ethylene dichloride, bis(2-
chloroethyl) ether, cadmium compounds, acrylonitrile, ethylene oxide, vinyl chloride, chromium
compounds, diphenyl methane diisocyanate, mercury compounds, 2,4-toluene diisocyanatc, antimony
compounds, ethylene dibromide, acrylamide, beryllium compounds, phosgene, 2,3,7,8-TCDD, 2,3,7,8-
TCDF, and coke oven emissions. In terms of POM data, states need to clearly identify how they define
POM and what species are included in the POM estimate.
d Control and rule percentages need to be entered when they are used to calculate emissions for a source
category.
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Area source emissions for the NET inventory have been compiled from several sources.
In some cases, point sources in the PEI may account for some of the area source emissions
currently in the NET inventory. States need to be cognizant of how a source's or source
category's emissions are being accounted for between the two inventories so that neither
double counting nor under reporting occurs.
/
2.3.3 Onroad Mobile Source Data Elements
Table 2-3 lists reporting requirements for onroad mobile sources. Unlike point or area
sources, only summer/winter work weekday emissions (average seasonal day) may need to be
reported, depending on the inventory type. Onroad mobile emissions are calculated using the
MOBILE model (or other state model such as California's EMFAC model), arid the resulting
emission factors are typically applied to daily VMT estimates to obtain a daily emissions
estimate. If the state chooses to provide to the NET inventory emissions information for this
source type developed for the PEI, then an estimate of annual emissions should be provided.
States should discuss their PEI reporting needs for onroad mobile annual and seasonal
emissions with their RO.
The data clement Source Category may be one of several ways of grouping onroad
mobile activity. Typically, the source category is defined by a combination of vehicle type,
i
roadway type, and vehicle speed for which vehicle miles traveled (VMT) are collected and
emission factors are calculated. Source categories by vehicle type are listed at the end of
Table 2-3 and in Appendix A.
VMT in the NET are based on VMT data taken from the Federal Highway
Administration's (FHWA) Highway Performance Monitoring System (HPMS). The VMT data
in HPMS is submitted to FHWA by each State's Department of Transportation. You are
welcome to review and provide comments on these VMT estimates. However, if you suggest
changes to VMT estimates that would make them different from the VMT estimates
7997-9l-03\RPTCiUII)l:IN ' 2-10 FINAL
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TABLE 2-3. DETAILED REPORTING REQUIREMENTS FOR ONROAD MOBILE
SOURCES FOR PEI AND NET INVENTORIES TABLE
ffiWtoM^SZ* '«%
^""'ty'? "f
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in HPMS, you will be asked to provide documentation explaining why these VMT estimates
are different from those submitted to FHWA by your State's Department of Transportation for
use in HPMS.
Please note that the data requested here is data sufficient for regional scale air
<
modeling. There may be more data needed for modeling by a state's RAMP (see Section 1.4).
As an example, mobile model inputs may be requested by RAMPs, but the data used to run the
MOBILE model have not been requested. States should document and maintain records on the
information and files used to run the MOBILE model, should they be requested to resolve
future questions. . «<-.
Vehicle refueling emissions can also be generated as an onroad mobile source through
the MOBILE model; however, EPA prefers that these emissions be reported as an area source
category of gasoline distribution-stage II.
2.3.4 Non-road Mobile Source Data Elements
The reporting requirements for non-road mobile source emissions are found in
Table 2-4. These requirements are focused on describing non-road estimates and do not
request an extensive amount of background information that may have been necessary to
support the estimates (e.g., data manipulations that may have been necessary to develop final
landing/takeoff activity for aircraft). Typically for non-road sources, a significant amount of
information may have to be developed for the activity used to calculate emissions. The
reporting requirements shown in Table 2-4 do not mandate that these background data be
provided as part of the PEI or NET inventory process. However, as discussed in Chapter 4,
states should keep a record of these data in their files, so that they can be used to resolve any
future questions that may arise. The regional office may ask for more detailed information
than what is defined here.
7W7.91.0?\RI'TGUII).1:IN
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TABLE 2-4. DETAILED REPORTING REQUIREMENTS FOR NON-ROAD MOBILE
SOURCES FOR PEI AND NET INVENTORIES
Pollutants Addressed
VOC,NO,,CX)
VOdNO^CO.PM-10.
PM-2^,S
Ammonia
Start date (inventory year)
State FIPS Code
County FIPS Code
Source Category Code
(Equipment Type)0
Pollutant Code
Annual Activity
Annual Emissions
Summer/winter work weekday
emissions
All data element terms'are defined in Appendix A.
\ \ Al's includes 37 pollutants EPA is focusing on in its National Toxics Inventory. The 37 are toluene, POM,
K-n.'cnc. formaldehyde, xylenes, 1,3- butadiene, tetrachloroethylene, trichloroethylene, acetaldehyde, acrolein,
i-.ic;h\ knc chloride, hydrazine, glycol ethers, styrene, arsenic compounoX chloroform, nickel compounds, lead
compounds, manganese compounds, ethylene dichloride, bis(2-chloroethyl) ether, cadmium compounds,
3jp. ionitnlc. ethylene oxide, vinyl chloride, chromium compounds, diphenyl methane diisocyahate, mercury
compounds. 2.4-toluene diisocyanate, antimony compounds, ethylene dibromide, acrylamide, beryllium
compounds, p'hosgene, 2,3,7,8-TCDD, 2,3,7,8-TCDF, and coke oven emissions. In terms of POM data, states
need to clearly identify how they define POM and what species are included in the POM estimate.
L-.qutpmcnt types that are used as source categories for non-road mobile sources are:
a Aircraft
b Locomotives
c Commercial Marine Vessels
d Other Equipment and Engine Types
- Lawn ana Garden Equipment
- Construction Vehicles
- Agricultural Vehicles
- Industrial Equipment
- Airport Service Equipment
- Recreational Equipment
- Logging Equipment
- Recreational Marine Equipment
- Light Commercial Equipment
7<>'>7.<>l-03\KPTGl)ir>.I-~IN
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The data requests for non-road mobile sources primarily focus on defining the source
categories inventoried and their location, the activity parameters for the category, and on
providing emissions estimates on an annual and average season daily basis. The individual
non-road source categories that are inventoried and reported are expected to be consistent with
those defined by EPA/OMS as the chief non-road emission categories. A list of the client non-
>
road categories is provided at the end of Table 2-4 and in Appendix A; although, a state can
certainly report additional non-road category emissions if they have them. It is possible that a
state would not need to include all of the OMS non-road source categories and thus would not
have to report anything for those (e.g., commercial marine vessels in landlocked states,
snowmobiles in ^Florida, etc.). Even though perhaps obvious, these exemptions should be
noted in the state's inventory documentation.
2.3.5 Biogenic and Geogenic Source Data Elements
Table 2-5 lists reporting requirements for PEI biogenic and NET inventory geogenic
sources. Biogenic sources are forests, agricultural crops and agricultural soils, emitting VOC
and NOX. The geogenic source covered in the NET inventory is wind erosion of agricultural
land as a source of PM-10 and PM-2.5.1
Biogenic sources are not included as part of the NET inventory. The EPA will provide
emission estimates for biogenic sources in the Fall of 1997 to the states through the Internet on
the NET Web page. Biogenic sources are part of the required data submission for the PEI.
States may decide to use the EPA's biogenic emission estimates for their PEI submission.
Models such as the Biogenic Emissions Estimation System (BEIS), are typically used
to estimate emissions for biogenic sources. The BEIS estimates emissions for a single modeled
day. The parameters recommended for the model run are chosen to represent a typical high,
but not peak, ozone day in the summer. For the PEI, only the results for the modeled day are
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TABLE 2-5. DETAILED REPORTING REQUIREMENTS FOR BIOGENIC AND
GEOGENIC SOURCES FOR PEI AND NET INVENTORIES
Pollutants Addressed
VOC.NO,
PM-10
Source Type
Biogenic
Geogenic
Start date (inventory year)
State FIPS Code
County FIPS Code
Source Category Code
Pollutant Code
Annual Emissions
Summer/winter work weekday
emissions (modeled day
emissions)
All data elements are defined in Appendix A.
Modeled day emissions are required for biogenic sources. These emission estimates are generated by the
Biogenic Emissions Estimation System (BEIS), which will typically be used for estimating emissions from this
source.
7997-9l-03\RPTGUID.FIN
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required. Geogenic sources are not required for the PEI, but are included in the NET
inventory. Emissions are provided for an average day and as an annual number.
2.4 SUMMARY DATA REPORTING
General summaries of the 1996 PEI data should be compiled in addition to the detailed
source data specified in Section 2.3. These summaries will be used to communicate answers to
the most frequently asked questions about an emissions inventory: how much, from where, and
of what type. This summary allows for a rapid, top-down evaluation of the inventory, and
when presented in a standardized style, will allow for easy and efficient comparison with other
state's inventories.
*
The reporting requirements presented in this guidance document should be viewed as
minimum requirements and EPA encourages state and local agencies to go beyond these
requirements should they chose. The minimum requirements are summarized below, and after
each summary a short example table is shown further illustrating the data requested.
Total emissions by pollutant (VOC, NOX, and CO) for ozone nonattainment areas and
CO for CO nonattainment areas, emissions should be expressed for the entire
designated nonattainment areas on both an annual and seasonal daily basis:
Example Table
; Pollutant
; voc
! "NO,
1 CO
Seasonal Daily
Emissions, tons/day
Annual Emissions,
tons/year
7'W.9|.QJ\RI'TGtJin I-IN
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Emissions by county and by pollutant for the total nonattainment area should be
provided on both an annual and seasonal basis:
Example Table
County Name
County 1
County 2
County 3
etc
Nonattainment
VOC Emissions
tons/yr
Ibs/day
CO Emissions
tons/yr..
Ibs/day
NOZ Emissions
tons/yr
Ibs/day
Total emissions by pollutant for each major source grouping in the inventory on a total
nonattainment area basis, provide data on both an annual and seasonal daily basis:
Example Table
Source Type
Point Sources
Area Sources
On-road Mobile
Sources
Nonroad Mobile -
Sources
Biogenic Sources
TOTAL EMISSIONS
VOC Emissions
tons/yr
Ibs/day
CO Emissions
tons/yr
Ibs/day
NOX Emissions
tons/yr
(
Ibs/day
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Total emissions by pollutant by major source grouping with each county or sub-county
area of the nonattainment area, data need to be presented on an annual and seasonal
daily basis, probably will need one table per pollutant:
Example Table - VOC Emissions
/
County
County 1
County 2
County 3
etc
TOTAL
Point Source
tons/
year
'
Ibs/
day
Area Source
tons/
year
Ibs/
day
On-road Mobile -
tons/
year
Ibs/
day
, Nonroad
Mobile
tons/
year
Ibs/
day
%
Biogenic
tons/
year
Ibs/
day
7097-9I-03\RPTGUID.I:IN
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3.0 ELECTRONIC DATA REPORTING REQUIREMENTS
3.1 OVERVIEW
>.
In addition to the paper copy reporting that was described in the previous chapter,
electronic reporting is also required. Paper copy reporting of inventory data for the PEI or for
changes to the NET inventorj|data must be accompanied by electronic reporting of the same
data. This guidance will deal in more general concepts of electronic reporting. This guidance
document will not prescribe specific data entry methods or a specific electronic file format, but
it will list five basic options from which the state can choose to electronically submit their data.
y
Five basic options for electronic data reporting exist:
Emission Inventory Improvement Program (EIIP)/ Electronic Data Interchange (EDI)
format;
EPA NET Database format;
NET Text File Overwrite Format;
- Acromctric Information Retrieval System (AIRS) APS (Facility Subsystem) format;
and
State-specific format.
In this chapter, each of the five basic reporting options will be described, and the steps
necessary to transfer data from a state's data system to the EPA will be reviewed.
Electronic reporting of inventory data is an issue that is dynamic and changing. States
should use resources such as the EIIP Data Management portion of the CHIEF BBS on the
7.FlN
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EPA TTN or the EIIP Data Management Web page on the EIIP Internet World Wide Web site
to keep abreast of the latest developments and direction."
States need to fully understand that all emissions inventory data that are submitted to
EPA electronically (or otherwise) will be made publicly available as part of the national
**
inventory (NET). Data could be placed on an FTP site and made accessible through the
Internet, placed on EPA electronic bulletin boards, or published in printed reports. States
should, therefore, not submit any confidential information to EPA as|| part of this process
because EPA will not have any provisions for dealing with this information and treating it
differently as confidential data. Any PEI provided by states is subject to full public disclosure.
3.2 ELECTRONIC REPORTING OPTIONS
The inventory data reported electronically will be stored and used by the EPA and by
other states for air modeling, tracking progress in meeting CAA requirements, setting policy
and answering questions from the public. The EPA is taking on the responsibility of creating
and maintaining the newly-designed central repository of inventory data for all states, but the
data in the central repository must be supplied by the states in electronic form. In order to
l.icilnatc the transfer of the state-generated inventory data, the EPA has supported the
development "of a standard for data transfer through the EIIP. The following discussions will
yive an overview of the EIIP data transfer developments and five basic options for electronic
data reporting of inventory data.
The EIIP has been set up as a collaboration between states, industry, academia and the
EPA to improve inventory methods and reporting. EIIP products that can be used to prepare
inventories are discussed in Chapter 5 of this document. One goal of the EIIP has been to
1 The OAQPS TTN/CHIEF can be accessed by modem by calling (919) 541-5742, or
through the Internet at: http://tnwww.rtpc.epa.gov/ .
7o<)7-<)i.o.wi'TGunyniN 3-2 FINAL
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develop a standard data transfer format. An EIIP Data Model has been developed to identify
the pertinent emission inventory data elements that are needed for regional air quality
modeling, and to standardize the data definitions and their relationships. The EIIP/EDI format,
and the EPA NET Database are being developed using the EIIP data model. When state and
local agencies consider using these options, they should compare their inventories and the EIIP
data model to ensure that the significant data elements and data relationships necessary for
emission inventory storage and transfer have been included.
The EIIP Data Model is described in EIIP Volume VH, Chapter 1, EIIP Phase 1 Data
Model.3 Additional documentation and background about the EIIP Data Model is available on
the EIIP portion of the CHIEF BBS on the OAQPS TTN and the EIIP Web page, and final data
model documentation is expected to be available on the BBS and Web page in Summer 1997.
Readers are urged to stay current on the status and structure of the model by consulting the
latest documents posted on either the BBS or Web page.
3.2.1 EIIP/EDI Format
The EIIP is developing a data transfer format using existing Electronic Data
Interchange (EDI) standards. The EDI data exchange standard is a nonproprietary standard
created and maintained by the American National Standards Institute (ANSI). The EIIP/EDI
format can provide a common data exchange format for federal, state and local government
agencies, and eventually for industry, to exchange emissions inventory information
electronically using a single data transfer format. This data transfer format can be used as a
bridge between all trading partners because as an external standard format, it does not require
or impose the rules of one unique or shared database.
The EIIP/ EDI format has been developed in draft and is being tested in a prototype
data transfer demonstration with two pilot states and EPA. The prototype demonstration is
expected to continue through Winter 1997. Any state/ local agency is welcome to become a
7997-9l-O.VRPT.FIN 3-3 FINAL
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pilot participant. Because the prototype is in a developmental phase, participants that pursue
this option will receive technical an administrative support from the EIIP. Interested pilot
participants should contact the EPA's Emission Factor and Inventory Group (EFIG).
The technical documentation which is necessary for the EDI data transfer prototype
.*
demonstration may be found on the EIIP portion of the CHIEF BBS on the OAQPS TTN and
the EH? Web page. Two documents may be especially useful to understand the EDI
development and the data transfer demonstration that is underway. They are: Summary of the
Data Management Committee Worlcplans and Technical Steps for Developing the EDI Format:
and the Prototype Demonstration for Data Transfer Method with Approach Study (final action
plan). The first document describes how the current draft EDI format was developed and the
second document provides an example of how EDI data transfer is done and the steps that the
trading partners will take to accomplish data transfer using the EIIP/EDI standard format.
Figure 3-1 illustrates the complete data transfer process, with the state and local agencies' and
receiving agencies' responsibilities in overlapping blocks.
The steps that a state will follow in the prototype data transfer system using the
EIIP/EDI data transfer format are:
1) - Identify a commercially available EDI translator that is compatible with the data
application and local computing system environment. (The current participants are
using the same EDI translator, provided as part of the EIIP prototype system.)
2) Program the translator using the EIIP/EDI technical documents. (The programming of
the shared EDI translator is provided as part of the EIIP prototype system.)
3) Define the loader file format for the translator. (The loader file format for the shared
translator is provided as part of the EIIP prototype system.)
4) Program a conversion utility to extract and map the state data into the appropriate fields
of the loader file format
7997.l:IN ' 3-4 FINAL
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X
I-N
§
H
03
I
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5) Convert the extract file of state data to an EDI formatted file, using the EDI translator.
6) Transfer the EHP/EDI standard format file to EPA.
Inventory data that has been converted to the EHP/EDI format can be made available to
the EPA or any other requestor by sending it on a floppy disk, electronically through Internet
E-mail, or by providing a downloadable file on an Internet FTP. site. The EHP/EDI prototype
demonstration intends to test data transfer via the Internet.
3.2.2 EPA NET Database Format
.*
Another data transfer option is to use the EPA NET Database Format. This new
database is being designed by EPA to accept state inventory data and store those data as part of
the NET inventory. The NET database will be compatible with the EBP data model, and
include the data elements and data relationships as they are defined in the EHP data model.
The NET database will also be used in the EIIP EDI data transfer prototype data transfer
demonstration described above.
Documentation for an input data transfer format to the NET database is expected to be
distributed by EFIG in Fall 1997. Distribution will be by mail, and also through the CHIEF
BBS and Internet World Wide Web site.
The basic steps for data transfer using the EPA NET database format are described as
follows:
1) Map state inventory data to the EPA NET database format.
2) Program a conversion utility to translate data in the state's database to EPA NET
database input format files, using the mapping scheme developed in Step 1. Software
needed for the translation could be any database or spreadsheet program or other data
handling system capable of generating files compatible with the NET file structure.
7907.9I-03\KPTGUID,1:IN 3-6 FINAL
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Information about AIRS can be found on the OAQPS TTN/AIRS BBS, or through the
OAQPS TTN Web page, described earlier in this chapter.
3.2.5 Other Electronic Reporting Formats
i
Other reporting formats for inventory data are electronic files in a state-specific format,
and may be either database, spreadsheet or flat ASCII files. This is the least favorable
alterative for electronic data submission to the EPA database. If data are provided in this form,
EPA will not make a commitment to enter that data into the central national database.
i
If a state intends to submit data in this form, the RO and EFIG should be contacted.
Either the RO or EFIG should be able to define the best possible form for the data.
If data are not entered into the national database, either because it was not submitted
electronically, or the EPA could not convert the data from the electronic format that it was
submitted in, then the EPA and other states will use the data generated for the NET inventory
for modeling and other air quality studies.
7997-91-0;}\RPTGUin.I;IN 3-8 FINAL
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Some states' data storage systems may be able to be programmed to output stored data
in the correct format
3) Use the software developed in Step 2 to translate state's data into EPA NET database
files.
4) Transfer the EPA NET database files to the EPA.
3.2.3 NET Text File Overwrite Format
The initial NET inventory files will be distributed by the EPA in Summer 1997 as both
text and database files. Some state or local agencies may choose to update the NET data by
overwriting the NET distribution file. Although this approach has the benefit of simplicity, the
potential for transcription errors is high. If significant changes are planned to replace the NET
data, this option is not recommended.
3.2.4 AIRS Format
The AIRS format has been used for electronic reporting for previous inventories and is
still the primary inventory data storage vehicle for several states. Although using the AIRS
format is a feasible and valid way to make an electronic inventory submittal, this method of
reporting has some limitations. The chief constraint is that only point source information can
be submitted in the AIRS format. Other portions of the AIRS system, such as the Area and
Mobile Source (AMS) system are no longer being maintained. Consequently, this option may
be less preferable to reporting in either the EIIP/EDI or EPA NET database transfer formats.
In order to accommodate 1996 PEI point source data submittals in the AIRS/AFS
format, the EPA will translate AFS-formatted data into a compatible format for storage in the
EPA repository database (most likely using the new EPA NET format). For States that submit
point source data via AIRS/AFS, it will be necessary to use one of the other data transfer
options discussed in this chapter, to submit area, mobile and biogenics data.
7997-91-03\RI'T
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4.0 DOCUMENTATION AND DATA REVIEW
4.1 DOCUMENTATION CONSIDERATIONS
Like any inventory reporting process of this magnitude, the 1996 PEI and NET
inventory submittals will need to contain a sufficient level of documentation to identify for the
reviewer's benefit how and from where the emissions estimates were derived. For the
1996 PEI submittals, EPA does not want to make documentation a major hurdle, but at the
same time it needs to ensure that the explanations provided are adequate to answer basic
inventory review questions. The level of detailed documentation that will be required of any
given inventory will likely follow the same theme that has been proposed in other recent EPA
guidance on the 1996 PEIs.2 That theme is that the necessary level of detailed documentation a
state or local agency must prepare and provide will be a negotiated position between the State
and the EPA Regional Office (RO) based on the RO's unique knowledge and understanding of
its states' inventories. It is not EPA's position or desire to impose some kind of uniform, "one
size fits all" set of documentation criteria on the 1996 PEI and NET inventory submittals.
Instead, the individual ROs can work directly with each of their respective state or local
agencies to determine what they (the RO) think is necessary in terms of sufficient
documentation. This approach will help the state focus on what-is important and will save the
RO from having to'review information that is not essential or necessary for inventory approval.
' However, for the purposes of the 1996 PEIs and NET inventory data (that may be
provided), states will need to provide a minimum level of documentation to EPA as a part of
the inventory reporting process, regardless of the specific and possibly more detailed
documentation requirements states may negotiate with their respective EPA RO. This type of
preliminary documentation will be crucial in helping EPA understand the context of various
inventory submittals and how they should be evaluated. The minimum level of documentation
should describe in broad general terms how the inventory data were collected and their source.
7y97-91-03\UPTGUIlU:IN
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In most cases, documentation for a source category may be no more than a sentence describing
the general method of emissions calculation and how the variables in the calculation were
obtained. For example:
1) Architectural coatings used the EIIP preferred method and U.S. Census Bureau
population data.
2) Plant B's HAP emissions have been compiled as part of this state's Title V permitting
program.
3) County C's area source inventory's VOC emissions were grown from 1993 using BEA
factors except for area source graphic arts, which was compiled through a survey of a
subset of facilities. The graphic arts survey was conducted in 1995 and data were
obtained from 70 percent of the sources. Results for the other 30 percent were
extrapolated from the survey data.
Examples of data sources would be source surveys, existing state databases, products of annual
state reporting requirements, state agency regional office files, permitting files, the projection
of a past inventory, AP-42 factors, the MOBILE model, etc. A description of this type should
be provided for all major source groupings (point, area, onroad mobile, etc.). The degree of
!iu:ic.itcuonzation within the major groupings will be up to the state and be a function of how
:«;».> jsij snurcc categories were addressed. In addition, if different state agency offices or
i::-.:rui.<. \\crc responsible for developing parts of the inventory.and they used differing
appriMcises. tins information should be summarized by office or district.
States should understand that while EPA is striving to provide flexibility, eliminate
redundant activities, and reduce the cost of complying with inventory reporting provisions, a
fundamental amount of explanatory information needs to accompany every inventory
submittal. This basic information is needed to explain, from an overview perspective, the
sources of the data, how were they compiled, who compiled them, what estimation methods
and tools were used, and are there any aspects that are unique or special that EPA should
7<)97.|>|.(ntllPTCHJII)FIN
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understand about an inventory. These kinds of information can be described in narrative form,
and in combination with simple tabular presentations.
Detailed documentation for the specific method of calculation for each source category
and facility within a category does not have to be submitted with the inventory (unless
"i
requested by the RO); however, the data should be maintained and available from the state files
if the EPA desires to investigate and understand the derivation of an estimate h> greater detail.
The data retained by the state should be sufficient to allow an independent reviewer to replicate
the state's emission estimates on site. It is also important that the informational references for
the method's input data be complete and specific. For example, the state records should
indicate the specific location within AP-42 that an emission factor came from, not just that it
came from AP-42.
The bulk of the detailed data that would be a part of complete documentation could, in
most cases, be made available or directly submitted as a part of the inventory electronic data
files EPA wants to obtain for the 1996 PEIs and NET inventory. The electronic reporting
requirements are specified in Chapter 2, and represent a very detailed level of information that
clearly will help document an inventory. Electronic files from state databases (primarily for
point sources), spreadsheets (primarily area sources), and models (e.g., MOBILE, BEIS, etc.)
used to produce the inventory will contain the bulk of all documentation needed to replicate
any estimate. State and local agencies are not being asked to reproduce or summarize this
detailed information for the sake of a paper copy inventory documentation report.
4.2 DATA REVIEW
Early in the inventory process, state agencies should contact their EPA regional office
to define completeness, submission requirements and QA issues for their inventory. Regions
may need to develop their own documentation standards.
7997-91 -03\KPTGUin.RN 4-3 FINAL
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Once compiled, the state and local agencies will submit the PEIs to their respective
EPA Regional Offices for review and evaluation. Each Regional Office will be responsible for
working with each individual PEI-submitting agency to determine how the data will be
reviewed and what kinds of, if any, additional, more detailed documentation will be required.
The goal of this approach is to better fit the review process to the specific inventory needs of
each state, instead of having a "one size fits all" approach to the review and approval process.
This approach is expected to make inventory review more focused, effective, and timely. The
goal is to be able to address specific needs and concerns of each state and its inventories, while
at the same time ensuring that a general level of review consistency is maintained across the
entire country. '
States should also send electronic data files of the PEI directly to EPA/EFIG in parallel
with sending them to the ROs for both initial submissions and any updated data. Also, states
should send any other electronic data files of information for updating the NET inventory data
to EPA/EFIG. EPA/EFIG will use both types of data files for NET inventory updating and
quality assurance purposes.
EPA/EFIG and EPA/OMS will provide oversight and guidance to the ROs on the
technical review of electronically submitted PEI data. In this capacity, the ROs may provide
questions to EPA/EFIG and EPA/OMS on electronic information. EPA/EFIG and EPA/OMS
will provide limited and specific review support and return comments as necessary to the RO.
The RO will review and consolidate all EPA comments into one set of comments that
addresses both the paper copy and electronically-submitted materials. These comments will
then be forwarded to the state or local agency so that the inventory can be revised.
The state or local agency can then revise the PEI submittal and provide it to the EPA
RO in final form so that the approval process can begin if required. The RO then has the
responsibility to conduct all final review and formally approve the 1996 PEI for the area. The
inventory data that are in electronic format will be loaded into the EPA database.
7997-91-03\RPTGUin,l;IN
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"V
5.0 PROCEDURAL GUIDANCE AND THE ROLE OF THE EMISSION
INVENTORY IMPROVEMENT PROGRAM (EHP)
Previous chapters in this guidance document have specified reporting requirements for
the PEI and NET data. These discussions have not included any guidance on the procedural
aspects of creating the emission inventory estimates. Instead of preparing and publishing new
procedural inventory guidance for the 1996 PEIs, EPA intends to rely on existing guidance and
the guidance materials being published by the Emission Inventory Improvement Program
(EIIP) to address procedural needs. The purpose of this chapter is to summarize the procedural
guidance resources available to states through the EIIP.
The EIIP is a cooperative effort between state and local agencies, industry, academia
and the EPA to improve air inventory methods and reporting. The EIIP process has been put in
place with the goals of helping state and local agencies develop higher quality inventory data,
reduce the costs of inventory development and to improve communications and understanding
among all inventory groups. The project has been supported by state and local agencies with
105 grant funds, and the various EIIP committees are composed of state and local agency
personnel, industry representatives and EPA staff. Review and feedback on EIIP products is
welcomed from anyone in the inventory community.
The EIIP has established committees to address emission inventory issues pertaining to
point, area, mobile, and biogenic sources, data management, quality assurance and interactions
between government agencies. The committees for point, area, and mobile source types are all
in the process of producing documents with specific procedural guidance on estimating
emissions for source categories within their source type. A subcommittee has also been
formed to examine the use of rule effectiveness in inventories. Point and Area Source
Committees have produced multiple chapters that each address the preferred and alternative
methods available for estimating emissions from a source category. The Biogenic Sources
Committee has a completed document on estimating emissions from four natural sources. The
7<)'n-<)l-0.1\RI'TGUID.FlN 5-1 FINAL
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responsibilities have been focused on developing a data model to be used for data reporting
(see Section 3.2). The Quality Assurance Committee is also working on the issue of bringing
quality assurance and quality control into all aspects of an emission inventory. Work includes
a volume of procedures for inventory quality assurance, software for evaluating the quality of
emission estimates, and training.
EJJP guidance documents can be found on the EUP Web site at: ,
http://134.67.104.12/html/chier7chief.htmSCH14, of through the general EPA TTN Web site at
http://ttnwww.rtpnc.epa.gov/.
*
The following sections briefly summarize each EIJP committee's goals and
accomplishments. Individual documents and their completion status as of June 1997 are also
listed for each committee.
5.1 POINT SOURCES
The Point Sources Committee has a mandate to address the needs for updated and
improved point source emissions estimation guidance. This guidance seeks to improve point
source emissions completeness, accuracy, consistency, quality assurance, and data
oruani/ation. -Source categories are selected for treatment by the committee based on the
significance of emissions nationally or regionally, the number of individual sources in the
category, the involvement of the category in a significant regulatory initiative, and the level of
uncertainties surrounding the methods currently available for emissions estimation. The
committee works through a team of EPA, state and local agency, industry, and consultant
personnel, and has been instrumental in encouraging industry participation in the EIIP point
sources process.
Completed chapters (as of June 1997) and those in progress in the EIIP Point Sources
volume4 are listed in Table 5-1. These documents have been compiled with the goal of
j 5-2 FINAL
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producing thoroughly explained procedures that can be used to develop consistent and
complete estimates of emissions from significant point sources. Quality assurance and data
organization issues specific to the source category are also covered in each chapter.
TABLE 5-1. POINT SOURCES VOLUME CHAPTERS
'
Introduction
Boilers
Hot-Mix Asphalt Plants
Equipment Leak Fugitives
Wastewater Collection and Treatment
Surface Coating
Semiconductor Manufacturing
Paint and Ink Manufacturing
Metals Production
Oil and Gas Field Production and
Processing
§>^^^^^^'W^^^J*'^0' w.^ -.^v^-ivC---*-, VwVk '"xS^sS'^Mft <^*S^ "*. V. "<&
In Progress
Complete
Complete
Complete
Complete
Complete
In Progress
Complete
In Progress
In Progress
5.2 AREA SOURCES
The Area Sources Committee has focused on area sources that primarily emit ozone
precursors, and have either been difficult to characterize in previous inventories, have been
large contributors, or are sources that may have changed substantially in recent years. Chapters
in the EI1P Area Sources volume5 and their completion status as of June 1997 are listed in
Table 5-2.
79')7-01-0.1\HI'T(iU!n.l:!N
5-3
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TABLE 5-2. AREA SOURCES VOLUME CHAPTERS
Introduction
Residential Wood Burning
Architectural Surface Coating
Dry Cleaning
Consumer/Commercial Solvent Use
Graphic Arts
Solvent Cleaning
Industrial Surface Coating
Pesticide Application
Gasoline Marketing
Autobody Refinishing
Petroleum Loading/Unloading
Traffic Markings
Landfills
Open Burning
Asphalt Paving
§g%^^§at^|%^V
Complete
Complete
, Complete
Complete
Complete
Complete
In Progress
hi Progress
hi Progress
In Progress
In Progress
In Progress
Complete
In Progress
In Progress
In Progress
5.3 MOBILE SOURCES
The Mobile Sources Committee has focused on improving and standardizing the
methods for developing locality-specific model input data for the MOBILES and the EMFAC
onroad emissions models. Guidance work has also addressed improving vehicle miles traveled
(VMT) data collection and non-road mobile emissions estimation methods. Chapters in the
EIIP Mobile Sources volume6 and their completion status as of June 1997 are listed in
Table 5-3. .
7997-91 -03\RPTGUID PIN
5-4
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TABLE 5-3. MOBILE SOURCES VOLUME CHAPTERS
^'^''^^"^^^''^^^^^^"^'^'''^---^ '' ~~ f""-"^ ?
^%,*^^^to^^BMk^ 0 ~; *y^v~*i
Methodology for Gathering Locality-
Specific Inventory Data
Use of Locality-Specific Transportation
Data for the Development of Mobile Source
Emission Inventories
Inputs for the Non-road Emission Model
Improved Mapping of Highway
Performance Monitoring System (HPMS)
Data to the MOBILE Model
f^P^clpltStat^r^" -:
i'^fe^p^«.^^)"^:^f^
Complete
Complete -
In Progress
In Progress
5.4 BIOGENIC SOURCES
Biogenic sources can be responsible for a large share of VOC and NO emissions in
some areas. The processes that lead to emissions are complex and require mathematical
models for their estimation. The Biogenic Sources Committee's goal has been to provide
emission inventory preparers with a basic understanding of the science behind the models for
estimating biogenic emissions of VOC and NO. The completed biogenic sources volume7
includes discussion and methods for estimating emissions from biogenic sources: VOC from
forest and agricultural land use types, and NO from agricultural soils; and also other natural
sources: NO, from lightning, and VOC from oil and gas seeps.
5.5 QUALITY ASSURANCE
The Quality Assurance (QA) Committee is motivated by the idea that a well-developed
and implemented QA program fosters confidence in the inventory. Because inventories such
as the PEI are the basis of many regulatory decisions, good quality assurance/quality control
(QA/QC) is crucial in avoiding errors and enhancing inventory quality. The committee's goals
7997-91-03\RPTGUID.F!N 5-5 FINAL
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are to improve, consolidate, and document preferred and alternative QA/QC practices and
procedures. Ultimately, using the EIIP QA approach should result in an increased confidence
in the data shared among agencies, and a common basis for quality comparisons.
The QA Committee's work has included a volume on quality assurance topics and
techniques,8 the application of the Data Attribute Rating System (DARS) to state and local
level emission inventories, training sessions for state, local and EPA personneLon the use of
DARS, and the development of DARS software. Chapters in the EIIP Quality Assurance
Volume are complete and they are presented in Table 5-4. The DARS software, which will be
completed in September 1997, is also a significant product from this group.
DARS uses a ratings system to assign scores to a system of inventory attributes- When
the scores are combined, a single composite score reflects the overall quality of an emission
estimate made using the rated method. The importance to inventory preparers is two-fold: first,
as a way to evaluate potential estimation methods during the planning stage of an inventory,
and second, as a way to evaluate the overall quality of the resulting inventory, and make
comparisons with other inventories. EPA strongly encourages states to apply the DARS
methods and DARS'software to their 1996 PEI data as a means of improving overall inventory
quality.
TABLE 5-4. QUALITY ASSURANCE VOLUME CHAPTERS
. - v^^l^P' "' /""^-^v*.
- Chapter Title ; ,'^^f",
Introduction: The Value of QA/QC
Planning and Documentation
General QA/QC Methods
Evaluating the Uncertainty of Emission
Estimates
Model QA Plan
% Chapter Status
, '/7(*»ael»97)'
Complete
Complete
Complete
Complete
Complete
7997-91-03\RPTGUID,F1N
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5.6 DATA MANAGEMENT
The results of the Data Management Committee's work will directly affect inventory
data submissions format and content. The committee's goal has been to develop and facilitate
an improved data exchange mechanism for the emission inventory community. The approach
taken has been to:
* -
Build consensus among states and local agencies, EPA, and industry;
Identify a data transfer protocol;
Standardize data transfer and definitions;
Build working relationships, not regulations;
Provide options and opportunity to achieve more for less money; and
Make use of emerging technology.
Data Management Committee products will include users guides to the data model
(now in external review and available on the CHIEF BBS) and data transfer format, an
implementation guideline for EDI translation, a "shopper's guide" to EDI translation software,
prototype demonstration, and user training on the data model and data transfer format.
The EIIP data model is discussed in more detail in Section 3.2.
7997-91-03\RPTGUID.FIN 5-7
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6.0 REFERENCES
1. U.S. Environmental Protection Agency. National Air Pollutant Emission Trends.
1900-1995. EPA Report No. EPA-454/R-96-007. Emission Factor and Inventory
Group, Office of Air Quality Planning and Standards. Research Triangle Park, North
Carolina! October 1996.
2. U.S Environmental Protection Agency. Action Plan for Submittal of 1996 Periodic
Emission Inventories and Review of NET Inventory Data. Emission Factor and
Inventories Group, Office of Air Quality Planning and Standards, Research Triangle
Park, North Carolina. January 6,1997.
\
3. Emission Inventory Improvement Program, Data Management Committee. EIIP
Volume VII. Chapter 1. EIIP Phase I Data Model. External Review Draft. Research
Triangle Park, North Carolina. October 1996.
4. Emission Inventory Improvement Program, Point Sources Committee. EIIP Volume II.
Point Sources. Draft in Progress. Research Triangle Park, North Carolina. 1997.
5. Emission Inventory Improvement Program, Area Sources Committee. EIIP Volume
III. Area Sources. Draft in Progress. Research Triangle Park, North Carolina. 1997.-
6. Emission Inventory Improvement Program, Mobile Sources Committee. EIIP Volume
IV. Mobile Sources. Draft in Progress. Research Triangle Park, North Carolina. 1997.
7. Emission Inventory Improvement Program, Biogenic Sources Committee. EIIP
Volume V. Bioeenic Sources. Final. Research Triangle Park, North Carolina. 1997.
8. Emission Inventory Improvement Program, Quality Assurance Committee. EIIP
Volume VI. Quality Assurance. Final. Research Triangle Park, North Carolina. 1997.
7997-91 -03\K1'TGUIO.F1N 6-1
FINAL
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APPENDIX A
DATA DICTIONARY FOR REPORTING REQUIREMENTS
DATA ELEMENTS
7997-91 -03\RI'TGUID.FIN FINAL
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APPENDIX A
The definitions provided below refer to the individual data element inventory reporting
requirements specified in this report in Chapter 2, Tables 2-1 through 2-5. Tables A-l through
A-4 cross reference the data elements from Chapter 2 with EIIP data entity and attribute names.
Point source data elements
Activity/throughput (annual)
A measurable factor or parameter that is directly or indirectly related to the emissions
of an air pollution source. Depending on the type of source category, activity information may
refer to the amount of fuel combusted, the amount of a raw material processed, the amount of a
product that is manufactured, the amount of a material that is handled or processed, population,
employment, number of units, or miles travelled. Activity information is typically the value
that is multiplied against an emission factor to generate an emissions estimate.
Annual Emissions
Actual emissions for a plant, point, or process, either measured or calculated.
Ash Content
Inert residual portion of a fuel.
Boiler Design Capacity
A measure of the size of a boiler, based on the reported maximum continuous steam
flow. Capacity is calculated in units of MMBtu/hr.
Control Device Type
The name of the type of control device (e.g., wet scrubber, flaring, or process change).
7997-91 -O.ViRPTGUID.FIN A-l
FINAL
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FIPS
Federal Information Placement System (FIPS). FIPS is the system of unique numeric
codes developed by the government to identify states, counties, towns, and townships for the
entire United States, Puerto Rico, and Guam.
Dav/wk in operations
i
Days per week that the emitting process operates.
** ""* »
Emission Factor
Ratio relating emissions of a specific pollutant to an activity or material throughput
level.
Tfojt fias Flow Rate
Numeric value of stack gas flow rate.
Exit Gas Velocity
Numeric value of an exit gas stream.
Exit Gas Temperature
Numeric value of an exit gas stream.
Fall Throughput (%)
Portion of throughput for the three Fall months. This represents the expression of
annual activity information on the basis of four seasons, typically spring, summer, fall, and
winter. It can be represented either as a percentage of the annual activity (e.g., production in
summer is 40% of the year's production), or in terms of the units of the activity (e.g., out of
600 units produced, spring =150 units, summer = 250 units, fall = 150 units, and winter = 50
units).
Federal ID Code (plant!
Unique codes for a plant or facility, containing one or more pollutant-emitting sources.
7997-91-(WRPTGUin.FIN A'2 FINAL
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Federal ID Code (point)
. Unique codes for the point of generation of emissions, typically a physical piece of
equipment.
Federal ID Code (process)
Unique codes for a single process or unit of operation that emits pollutants.
Federal ID Code (staclct
Unique codes for the point where emissions from one or more processes are released
into the atmosphere.
Heat content
The thermal heat energy content of a solid, liquid,or gaseous fuel. Fuel heat content is
typically expressed in units of Btu/lb of fuel, Btu/gal of fuel, joules/kg of fuel, etc.
Hr/day in operations
Hours per day that the emitting process operates.
Maximum Design Rate
Maximum fuel use rate based on the equipment's or process' physical size or
operational capabilities.
Maximum Namcplate Capacity
A measure of the size.of a generator, and is put on the unit's nameplate by the
manufacturer. The data element is reported in MW or KW.
Physical address
Street address of facility.
Pollutant Code
A unique code for each reported pollutant that has been assigned in the EIIP Data
Model. Character names are used for criteria pollutants, while Chemical Abstracts Service
(CAS) numbers are used for all other pollutants. Some states may be using SAROAD codes
for pollutants, but these should be able to be mapped to the EIIP Data Model pollutant codes.
7997-91-03\RPTGUin.F!N A-3
FINAL
-------
primary Control Efficiency
The emission reduction efficiency of a primary control device, which shows the amount
of reduction of a particular pollutant from a process' emissions due to controls or material
change. Control efficiency is usually expressed as a percentage or in tenths.
Rule Effectiveness % (RE%)
*f
The measure of a regulatory program to achieve all of the emission reductions possible,
which reflects the assumption that controls are typically not 100 percent effective, because of
equipment downtime, upsets, decreases in control efficiencies, and other deficiencies in
emission estimates. RE is used to adjust the control efficiency.
Source category code. A process-level code that describes the equipment or operation
emitting pollutants.
Secondary Control Efficiency
The emission reduction efficiency of a secondary control device, which shows the
amount of reduction of a particular pollutant from a process' emissions due to controls or
material change. Control efficiency is usually expressed as a percentage or in tenths.
SIC code
Standard Industrial Classification code. U.S. Department of Commerce's categorization
of businesses by their products or services.
SIR- \.imc
The name of the facility..
Spnnu Throughput (%)
Portion of throughput or activity for the three spring months. See the definition of Fall
Throughput.
Stack Height
Stack physical height above the surrounding terrain.
7'W.9|.03\KI'TGUID.FIN ' A"4 FINAL
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Stack Diameter
Stack physical diameter.
Start Date (inventory year)
The calendar year that the emissons estimates were calculated for and are applicable to.
»
Start time fhourt
Start time (if available) that was applicable and used for calculations of emissions
estimates.
State FIPS
Federal Information Placement System (FIPS). FIPS is the system of unique numeric
codes developed by the government to identify states, counties, towns, and townships for the
entire United States, Puerto Rico, and Guam.
Summer Throughput (%)
Portion of throughput or activity for the three summer months. See the definition of
Fall Throughput.
Sulfur Content
Sulfur content of a fuel, usually expressed as a percentage.
Winter Throuuhpiit (%)
Portion of throughput or activity for the three winter months. See the definition of Fall
Throughput.
Wk/vr in operations
Weeks per year that the emitting process operates.
Work Weekday Emissions
Average day's emissions. The NET inventory provides average summer, or ozone
season, day emissions.
7
-------
X coordinate (latitude!
East-west geographic coordinate of a stack.
Y coordinate (longitude!
North-south geographic coordinate of a stack:
v-
Area Source Data Elements . ,
Activity/Throughput
A measurable factor or parameter that is directly or indirectly related to the emissions
of an air pollution source. Depending on the type of source category, activity information may
refer to the amount of fuel combusted, the amount of a raw material processed, the amount of a
product that is manufactured, the amount of a material that is handled or processed, population,
employment, number of units, or miles travelled. Activity information is typically the value
that is multiplied against an emission factor to generate an emissions estimate.
Annual Emissions
Actual emissions for an area source.
Control Efficiency (%)
The emission reduction efficiency, which shows the amount of reduction of a particular
pollutant from a process' emissions due to controls or material change. Control efficiency is
usually expressed as a percentage or in tenths.
Countv FIPS
Federal Information Placement System (FIPS). FIPS is the system of unique numeric
codes developed by the government to identify states, counties, towns, and townships for the
entire United States, Puerto Rico, and Guam.
Dav/wk in operations
Days per week that the emitting process operates.
Emission Factor
Ratio relating emissions of a specific pollutant to an activity or material throughput
level.
7W7.«)MJ*\KI'TCiUII>l:IN A-6 FINAL
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Fall Throughput (%\
Portion of throughput or activity for the three fall months. This represents the
expression of annual activity information on the basis of four seasons, typically spring,
summer, fall, and winter. It can be represented either as a percentage of the annual activity
(e.g., production in summer is 40% of the year's production), or in terms of the units of the
activity (e.g., out of 600 units produced, spring =150 units, summer = 250 units, fall =150
units, and winter = 50 units).
Hr/day in operations
Hours per day that the emitting process operates.
Pollutant Code
A unique code for each reported pollutant that has been assigned hi the EIIP Data
Model. Character names are used for criteria pollutants, while Chemical Abstracts Service
(CAS) numbers are used for all other pollutants. Some states may be using S AROAD'codes
for pollutants, but these should be able to be mapped to the EDP Data Model pollutant codes.
Rule Penetration (%) CRP%)
The percentage of an area source category that is covered by an applicable regulation.
Rule Effectiveness (%) fRE%)
Source Category Code
Source category code. A code that identifies the process, equipment, operation or the
industry emitting pollutants.
Spring Throughput (%}
Portion of throughput or activity for the three spring months. See the definition of Fall
Throughput.
Start Date (inventory year)
The calendar year that the emissons estimates were calculated for and are applicable to.
7997-<)l-0.1\RI'TGUII)lrIN A-7 FINAL
-------
State FIPS
Federal Information Placement System (FIPS). FIPS is the system of unique numeric
codes developed by the government to identify states, counties, towns, and townships for the
entire United States, Puerto Rico, and Guam.
Summer/winter work weekday emissions
)
Emissions for an average day. The NET inventory provides average summer, or ozone
season, day emissions. .. . .
Summer Throughput (%}
Portion of throughput or activity for the three summer months. See the definition of
Fall Throughput!
Winter Throughput (%)
Portion of throughput for the three winter months. See the definition of Fall
Throughput.
Wk/vr in operations
Weeks per year that the emitting process operates.
Onroad and Non-Road Mobile Sources
Activity Information
Activity is a measurable factor that is directly or indirectly related to the amount of
pollutants emitted. For onroad mobile sources, activity is typically vehicle miles of travel
(VMT). For non-road mobile sources, activity may be factors such as fuel used or estimated
hours of use.
Annual Emissions
Calculated emissions for the year for the source category.
County FIPS Code
Federal Information Placement System (FIPS). FIPS is the system of unique numeric
codes developed by the government to identify states, counties, towns, and townships for the
entire United States, Puerto Rico, and Guam.
7097-<>1-03\RPTGUID,F1N A-8 FINAL
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> JC-
Emission Factor
Ratio relating emissions of a specific pollutant to an activity, in the case of onroad
mobile sources, VMT.
Non-road Mobile Source Equipment Types
The categories of non-road mobile source emissions as defined by EPA's Office of
Mobile Sources and documented in the EPA guidance document Procedures for Emissions
Inventory Preparation. Volume IV: Mobile Sources (EPA-450/4-81-026d). The-categories
included but not limited to are:
Aircraft
Locomotives
Commercial Marine Vessels
Other Equipment and Engine Types
- Lawn and Garden Equipment
- Construction Vehicles
- Agricultural Vehicles
- Industrial Equipment
- Airport Service Equipment
- Recreational Equipment
- Logging Equipment
- Recreational Marine Equipment
- Light Commercial Equipment
Within the subcategories of Other Equipment and Engine Types are more specific categories of
equipment, such as leaf blowers, shredders and tillers in the Lawn and Garden Equipment
category.
Onroad Mobile Source Category
The categories of onroad mobile source emissions as defined by EPA's Office of
Mobile Sources and the MOBILE model. The recognized categories are:
light duty gasoline vehicles
light duty gsaoline trucks I
light duty gasoline trucks II
light duty diesel vehicles
light duty diesel trucks
heavy duty gasoline vehicles
heavy duty diesel vehicles
motorcycles
7997-91-03\RPTOUID.I:1N A-9 FINAL
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Pollutant Code
A unique code for each reported pollutant that has been assigned in the EIIP Data
Model. Character names are used for criteria pollutants, while Chemical Abstracts Service
(CAS) numbers are used for all other pollutants. Some states may be using S AROAD codes
for pollutants, but these should be able to be mapped to the HEP Data Model pollutant codes.
-------
Biogenic and Geogenic Sources
Annual Emissions
Calculated emissions for the year for the source category. Annual emissions are usually
not developed for bipgenic sources. The NET inventory provides annual numbers for geogenic
sources.
County FIPS Code
Federal Information Placement System (FIPS). FIPS is the system of unique numeric
codes developed by the government to identify states, counties, towns, and townships for the
entire United States, Puerto Rico, and Guam.
Pollutant Code "
A unique code for each reported pollutant that has been assigned in the EIIP Data
Model. Character names are used for criteria pollutants, while Chemical Abstracts Service
(CAS) numbers are used for all other pollutants. Some states may be using SAROAD codes
for pollutants, but these should be able to be mapped to the EIIP Data Model pollutant codes.
Source Category Code
Source category code. A code that identifies the process emitting pollutants.
Start date (inventory,year)
The calendar year that the emissons estimates were calculated for and are applicable to.
State FIPS Code
Federal Information Placement System (FIPS). FIPS is the system of unique numeric
codes developed by the government to identify states, counties, towns, and townships for the
entire United States, Puerto Rico, and Guam.
Summer/winter work weekday emissions
Emissions for a single day. Geogenic sources reported in the NET inventory are for an
average summer day. Biogenic sources should have the modeled day emissions reported.
7997-91-03\RPTGUID.I:IN A-l 1 FINAL
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TABLE AI-1. PEI AND NET INVENTORY DATA ELEMENT AND EIIP ENTITY
AND ATTRIBUTE CROSS REFERENCE FOR POINT SOURCES
Start Date (inventory year)
Start time (hour)
State FIPS
County FIPS
SIC code
Federal ED Code (plant)
Federal ID Code (point)
Process ID Code
Site Name
Physical address
sec
Pollutant Code
Emission Factor
Heat content
Sulfur Content
Ash Content
Activity' throughput (annual)
Winter Throughput (%)
Spring Throughput (%)
Summer Throughput (%)
Fall Throughput (%)
Hr/day in operations
Day/wk in operations
Wk/yr in operations
Boiler Design Capacity
Maximum Design Rate
Emissions
Emissions
Geographic Location
Geographic Location
Site/Source
Site/Source
Emission Unit
Emission Process
Site/Source
Site/Source
Emission Process
Emissions
Emission Factors
Emission Process
Emission Process
Emission Process
Activity
Emission Process
Emission Process
Emission Process
Emission Process
Emission Process
Emission Process
Emission Process
Emission Unit
Emission Unit
> -^s-^^^ys^ ^s ^A%,^.« *%^-?^
Start Date/Time
Start Date/Time
State/Province/Territory
County/Parish/Reservatio
SIC
Federal ID Code
Federal ID Code
Process ID Code
Site Name
Physical Street Address
sec
Pollutant Code
Numeric Factor
Heat content
Sulfur Content
Ash Content
Start Date/Time
Process Rate/Throughput
Winter Throughput (%)
Spring Throughput (%)
Summer Throughput (%)
Fall Throughput (%)
Hours per Day
Days per Week
Weeks per Year
Design Capacity
Design Capacity
7')')7.y|.03\RlM(H)ini:IN
A-12
FINAL
-------
TABLE Al-1.
PEI AND NET INVENTORY DATA ELEMENT AND EIIP ENTITY
AND ATTRIBUTE CROSS REFERENCE FOR POINT SOURCES
(CONTINUED)
-HI,
Maximum Nameplate Capacity
Primary Control Efficiency
Secondary Control Efficiency
Control Device Type
Rule Effectiveness %
Annual Emissions
Work Weekday Emissions
Federal ID Code (Stack
X coordinate (latitude)
Y coordinate (longitude)
Slack Heiaht
Slack Diameter
Lxit Gas Mow Rate
EMI Gas Velocity . .
Exit Gas Temperature
Emission Unit
Control Equipment
Control Equipment
Control Equipment
Aggregate Controls as
Applied
Emissions
Emissions
Emission Release Point
Geographic
Geographic
Stack Physical
Stack Physical
Stack Physical
Stack Physical
Stack Physical
>>^^%y^>xx^"^ 'xV^x^i^5^ lt%₯??
^^^H^A^b»ife^^^
Design Capacity
.Percent Control
Percent Control
Device Type
Rule Effectiveness
Start Date/Time
Numeric Value
Start Date/Time
Emission Type
Numeric Value
End Date/Time
Federal ID Code
X Coordinate
Y Coordinate
Stack Height
Stack Diameter
Exit Gas Flow Rate
Exit Gas Velocity
Exit Gas Temperature
A-13
FINAL
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TABLE Al-2. PEI AND NET INVENTORY DATA ELEMENT AND EIIP ENTITY AND
ATTRIBUTE CROSS REFERENCE FOR AREA SOURCES
I.;-,
Start Date (inventory year)
Start tirrie (hour)
State FEPS
County FIPS
Source Category Code
Pollutant Code
Emission Factor
Activity/Throughput
i
Winter Throughput (%)
Spring Throughput (%)
Summer Throughput (%)
Fall Throughput (%)
Hr/day in operations
Dav/wk in operations
Wk'vr in operations
Control Efficiency (%) .
Rule Effectiveness (%)
Rule Penetration (%)
Annual Emissions
Summer/winter work weekday
emissions
Emissions
Emissions
Geographic Location
Geographic Location
Emission Process
Emissions
Emission Factors
Activity
Emission Process
Emission Process
Emission Process
Emission Process
Emission process
Emission process
Emission process
Control Equipment
Properties
Aggregate Controls as
Applied
Aggregate Controls as
Applied
Emissions
Emissions
^ilirifl? AtfciW^%^
^C&*XxX"* *.Nts^ ~u.Kv.xv
Start Date/Time
Start Date/Time
State/Province/Territory
County/Parish/Reservatio
AMS Code
Pollutant Code
Numeric Value
Start Date/Time
Process Rate/Throughput
Winter Throughput (%)
Spring Throughput (%)
Summer Throughput (%)
Fall Throughput (%)
Hours Per Day
Days per Week
Weeks per Year
Percent Control Efficiency
t
Rule Effectiveness
Rule Penetration
Start Date/Time
Numeric Value
Start Date/Time
Emission Type
Numeric Value
End Date/Time
7TO7-9l-0.1M
-------
TABLE Al-3. PEI AND NET INVENTORY DATA ELEMENT AND EIIP ENTITY AND
ATTRIBUTE CROSS REFERENCE FOR ON ROAD AND NONROAD
SOURCES
Start Date (inventory year)
Emissions
Start Date/Time
Start time (hour)
Emissions
Start Date/Time
State FIPS
Geographic Location
State/Province/Territory
County FIPS
Geographic Location
County/Parish/Reservation
Source Category Code
Emission Process
AMS Code
Pollutant Code
Emissions
Pollutant Code
Emission Factor
Emission Factors
Numeric Value
Activity
Schedule
Process Rate/Throughput
Annual Emissions
Emissions
Start Date/Time
Numeric Value
Summer/winter work weekday
emissions
Emissions
Start Date/Time
Emission Type
Numeric Value
End Date/Time
7907-91 -03\R!'TGU!D.I:IN
A-15
FINAL
-------
TABLE Al-4. PEI AND NET INVENTORY DATA ELEMENT AND EIIP ENTITY AND
ATTRIBUTE CROSS REFERENCE FOR BIOGENIC AND GEOGENIC
SOURCES
Start Date (inventory year)
Start time (hour)
State EDPS
County FIPS
Source Category Code
Pollutant Code
Annual Emissions
Summer/winter work weekday
emissions (modeled day
emissions)
',/ VsV - %,;^ -, -", " ^ % ;-; \\ :
^s **, -^^.^^^°;v^^^^^;
Emissions
Emissions
Geographic Location
Geographic Location
Emission Process
Emissions
Emissions
Emissions
-.'^A^i ^ IN..,* «j5v """'' NN^"\'' ^
Start Date/Time
. Start Date/Time
State/Province/Territory
County/Parish/Reservation
AMS Code
Pollutant Code
Start Date/Time
Numeric Value
Start Date/Time
Emission Type
Numeric Value
End Date/Time
7997-91-03\RI'TGUID,FIN
A-16
FINAL
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TECHNICAL REPORT DATA
(PLEASE READ INSTRUCTIONS ON THE REVERSE BEFORE COMPLETING)
1. REPORT NO. 2.
EPA454/R-97-005
4. TITLE AND SUBTITLE
REPORTING GUIDANCE FOR 1996 PERIODIC EMISSION
INVENTORIES AND NATIONAL EMISSION TRENDS (NET)
INVENTORIES
7. AUTHOR(S)
GARRY BROOKS AND LUCY ADAMS
t
9. PERFORMING ORGANIZATION NAME AND ADDRESS
EASTERN RESEARCH GROUP
PO BOX 2010
1600 PERIMETER PARK
MQRRISVILLE. NC 27560-2B10
12. SPONSORING AGENCY NAME AND ADDRESS
ENVIRONMENTAL PROTECTION AGENCY
OAF/OAOP^/PMAn/CClA «Mn tA\
«""*"V*MWrO»CIVlHLMCrHS (MU-14)
RESEARCH TRIANGLE PARK, NC 27711
3. RECIPIENTS ACCESSION NO.
6. REPORT DATE
6/30/97
6. PERFORMING ORGANIZATION CODE
8. PERFORMING ORGANIZATION REPORT NO.
10. PROGRAM ELEMENT NO.
11. CONTRACT/GRANT NO.
68-D2-0160 WA#4-91
13. TYPE OF REPORT AND PERIOD COVERED
FINAL
14. SPONSORING AGENCY CODE
EPA/200/04
15. SUPPLEMENTARY NOTES ' _.
EPA WORK ASSIGNMENT MANAGER: WILLIAM B. KUYKENDAL
16. ABSTRACT '
I[!!LD£CUMENT PROVIDES GUIDANCE TO STATE AND LOCAL AGENCIES FOR THE PREPARATION AND
SUBMtTTAL OF EMISSION INVENTORIES FOR CALENDAR YEAR 1996. THE DOCUMENT DISCUSSES TWO
TYPES OF EMISSION INVENTORY SUBMITTALS. THE FIRST TYPE IS THE PERIODIC EMISSION INVENTORIES
TXHp^ARDEA!lEKQUIRED FOR ALL 020NE AND CARBON MONOXIDE NONAT?SENT ARE£» TH! SECOND
^VENTOR ^SlSSS^SSySiS^^ (NET) INVENTORY W"10" 'S A COMPREHENSIVE NATIONAL
INVENTORY COVERING BOTH CRITERIA AND AIR TOXIC POLLUTANTS FOR EACH COUNTY IN THE UNITED
IIDSTOPICS COVERED«Y THIS GUIDANCE ARE DATA REPORTING REQUIREMENTS, ELECTRONIC DATA
RESOURCES 0EMQHOW TnNolc2?^U?ENTATION REQU'REMENTS, AND A SUMMARY OF AVAJL^BLE
RESOURCES ON HOW TO PREPARE THESE EMISSION INVENTORIES.
17.
a. DESCRIPTORS
EMISSION INVENTORIES
PART1CULATE MATTER
OZONE
AIR TOXICS
GUIDANCE
KEY WORDS AND DOCUMENT ANALYSIS
18. DISTRIBUTION STATEMENT
UNLIMITED
b. IDENTIFIERS/OPEN ENDED TERMS
EMISSION INVENTORIES
UNCLASSIFIED
UNCLASSIFIED
c. COSATI FIELD/GROUP
21. NO. OF PAGES
76
22. PRICE
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